STJグループ（株式会社サンテレコムジャパン、株式会社STJレンテック） Product Lineup

Smartphones are essential items that support business efficiency and communication both inside and outside the company. However, what if important data were to leak externally due to loss or theft? Just imagining it is chilling, isn't it? To reduce such risks, Apple's security feature "Activation Lock" is gaining attention. In fact, this feature is quite useful for managing corporate smartphones. "What exactly is Activation Lock?" "How do you use it?" In this article, we will clearly explain its mechanism, benefits, and how it can be effectively utilized for corporate purposes. *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.*

Many people are preparing for disasters. Communication disruptions are one type of disaster. In this column, we will introduce methods to prepare for communication disruptions, specifically DSDS (Dual SIM Dual Standby) and secondary line services. When a communication disruption occurs suddenly, important data may become impossible to send or receive, and systems may come to a halt. Are you fully prepared for such situations? To prepare for such scenarios, there is a method called communication redundancy. *For more detailed information, please refer to the related links. Feel free to contact us for more details.*

Unlike mobile phones, radios (transceivers) that allow for group communication with a single button are invaluable in various situations. Just having a radio enables quick information sharing at any time, and its broadcast capability and immediacy greatly contribute to improving work efficiency. There are various types of radios, but one that has recently gained attention is the IP radio app that utilizes mobile phone network communication areas. In this article, we will introduce the types and features of standard radios, compare standard radios with IP radio apps, highlight the unique features of IP radio apps, provide case studies, and finally present the IP radio apps we offer. *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.*

eSIM is a system that allows users to utilize communication carrier services using a digital SIM embedded in devices such as smartphones. It enables online contracts and immediate activation, and it also supports dual SIM functionality, leading to an increase in companies adopting it for corporate contracts. In this column, we will provide a detailed explanation of the basic mechanism of eSIM, its advantages and disadvantages, as well as recommended models for corporate use and integration with Mobile Device Management (MDM). *For more details on the column, please refer to the related links. Feel free to contact us for more information.

Last year, Apple announced the generative AI feature "Apple Intelligence," which became a major topic of discussion. The long-awaited Japanese version has finally arrived in April 2025! It's different from the previous Siri, packed with convenient features that make daily tasks much easier, such as assisting in the creation of text and images. In this article, we will clearly explain how to utilize Apple Intelligence in business settings, along with important points to consider. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.*

Frequent iOS updates occur while using an iPhone. It is important to update to the latest software, but many people have questions like, "What exactly is an update?" and "What happens if I skip an update?" Therefore, this time, in addition to the basics of iPhone updates, we will also explain the impact of skipping updates. *For detailed content of the column, you can view it through the related links. Please feel free to contact us for more information.*

There are two main types of smartphones. One is the iPhone, which uses iOS, and the other is the Android smartphone, which uses Android OS. When considering implementation, some corporate representatives may wonder, "Which is better for corporate use, iPhone or Android?" Both iPhone and Android have their own features and advantages, but this time I will explain the recommended points of Android smartphones. I will also introduce recommended models for businesses and convenient services, so please use this as a reference. *You can view the detailed content of the column through the related links. For more information, please feel free to contact us.*

Have you ever used a pocket Wi-Fi that utilizes the currently popular cloud Wi-Fi? At Santelecom Japan, we offer "STJ Rental Wi-Fi" for corporate customers. Although I usually guide customers, I wanted to verify whether "cloud Wi-Fi really connects comfortably" and "whether the switching is smooth even while moving," so I decided to use STJ Rental Wi-Fi myself for a few days. This time, I will honestly report on my experience, including both the good points and the concerns I had. *For more detailed information, you can view the related links. For more details, please download the PDF or feel free to contact us.*

Recently, there has been an increase in pocket Wi-Fi services using cloud SIM technology. Cloud SIM is a pocket Wi-Fi that allows data communication at low rates over a wide area without the need for a specific carrier's SIM. For those in charge of companies using traditional major carrier pocket Wi-Fi, this may be an unfamiliar service. This time, we will introduce the advantages and disadvantages of cloud Wi-Fi, as well as rental services that can be used at a good price, aimed at those individuals. Please consider this as a reference. *You can view the detailed content of the column through the related links. For more information, please feel free to contact us.

In today's business environment, smartphones have become an indispensable presence, and device malfunctions or damage pose a significant risk that can directly lead to business interruptions. The prices of smartphones have been rising year by year, and it is not uncommon for models to exceed 100,000 yen. This article provides a detailed explanation of the necessity and benefits of smartphone insurance for corporations. Additionally, we will introduce recommended insurance services and operational methods, so please be sure to read to the end. *For detailed content of the column, you can view it in PDF format. For more information, please feel free to contact us.*

MDM (Mobile Device Management) is effective for managing and monitoring corporate smartphones and mobile phones. This time, we will introduce "Restrictions," which is suitable for managing iOS devices, as one of the main features of MDM. "Restrictions" help unify the operational policies of corporate smartphones, enhance security, and prevent personal use. In this article, we will explain why to use restrictions with MDM and how users can comfortably utilize them. Please be sure to read until the end. *For detailed content of the column, you can view it from the related links. For more information, please feel free to contact us.

MDM (Mobile Device Management) is effective for managing and monitoring corporate smartphones and mobile phones. In addition to device management and security enhancement, MDM has convenient features, among which the "app distribution feature" is very helpful for improving the operational efficiency of corporate smartphones and preventing personal use. In this article, we will explain the "app distribution feature" of MDM and also introduce the convenient feature "App Catalog" of our MDM product, 'OptimalBiz.' *For detailed content of the column, you can view it through the related links. For more information, please refer to the PDF materials or feel free to contact us.

This page introduces "Apple Business Manager" (hereinafter referred to as "ABM"), which is essential for managing iOS and iPadOS devices. ABM is a program provided by Apple for businesses that supports the realization of more advanced device management by integrating with the general term "MDM tools," which includes automatic device enrollment and bulk app distribution. There are no costs involved. *For detailed content of the column, you can view it through the related links. For more information, please refer to the PDF materials or feel free to contact us.

To efficiently manage and secure mobile devices necessary for business, the MDM solution is recommended. MDM refers to services or software that centrally monitor and manage mobile devices. In this article, we will clearly explain the necessity, functions, and implementation points of MDM. *For detailed content of the column, please refer to the related links. For more information, please check the PDF materials or feel free to contact us.*

Recently, many companies have been incorporating BPO and outsourcing as important elements in their management strategies. While the term "BPO" is known, it seems that there are still few people who accurately understand its specific content. In this article, we will explain the overview of BPO in detail, discuss its advantages and disadvantages, and also introduce BPO in the management and operation of company smartphones. *For detailed content of the column, you can view it through the related links. For more information, please refer to the PDF materials or feel free to contact us.*

Do you have any concerns about managing business terminals? "Frequent configuration errors" "Spending too much time on inquiries" "Managing terminals is too cumbersome" Suntelecom Japan's original BPO service "MaruMoba" solves all of these issues. In this article, we will provide a detailed introduction on how MaruMoba's features, implementation benefits, and actual success stories can address terminal operation challenges. A must-read for those aiming to improve operational efficiency and promote DX. *For more details, you can view the related links. For further information, please download the PDF or feel free to contact us.*

The "Lenovo Tab M10a 5G" is a 5G-compatible tablet for businesses that features a Snapdragon(TM) 695 CPU. In 5G areas, it enables high-speed communication, making video conferencing and video viewing comfortable. It comes with 4GB of RAM, allowing the simultaneous use of multiple business applications. Additionally, it supports 64GB of ROM storage and is compatible with a 1TB microSDXC(TM) card, enabling the storage of large data volumes. 【Features】 ■ Sturdy dustproof and waterproof design ■ Full HD with narrow bezels ■ Smooth visuals that are easy to see from any angle ■ Reading mode ■ Screen split function and floating mode *For more details, please download the PDF or feel free to contact us.

The "DIGNO Tab2 5G KYT35" is a 5G-compatible tablet that strongly supports business operations. It supports NFC reading and payments without the need for an external reader, and it is equipped with reliable durability and comprehensive business functions for on-site use. Additionally, it supports Dual SIM with both physical SIM and eSIM, allowing multiple networks to be utilized on a single tablet. This enables communication redundancy and can be effectively used as a BCP (Business Continuity Plan) measure. 【Features】 ■ Supports NFC reading and payments without an external reader, all in one device ■ Reliable durability and comprehensive business functions for on-site use ■ Streamlining of management tasks and robust security measures *For more details, please download the PDF or feel free to contact us.

The "Speed Wi-Fi 5G X12" is a pocket-sized WiFi device that supports 5G and Wi-Fi 6, enabling high-speed and stable wireless communication. It is compatible with WPA3, the advanced version of WPA/WPA2, which provides enhanced security measures while maintaining compatibility with WPA2. Additionally, it features a lightweight and easy-to-hold body, equipped with a 4000mAh battery, allowing for approximately 9 hours of continuous communication even while on the go. 【Features】 ■ Supports 5G networks and Wi-Fi 6 ■ Compatible with the advanced Wi-Fi security standard WPA3 ■ Long-lasting battery and lightweight, easy-to-hold body ■ Easy to configure various settings ■ Improved functionality *For more details, please download the PDF or feel free to contact us.

The "GRATINA (KYF44)" is a mobile phone designed for businesses, equipped with high-quality call capabilities and a reliable recording function. If there are two or more missed calls from the same person within 10 minutes, the ringtone will gradually increase in volume, and the vibration duration will be extended. Additionally, without the need for earphones or conversion cables, you can listen to the radio within the broadcast area by simply touching the bottom of the device. This feature allows you to obtain useful information during emergencies, such as disasters. 【Features】 ■ Advanced call functions to ensure you never miss important calls ■ Durable and hygienic, providing comfortable use over time ■ Smart features and peripherals that evolve your work style *For more details, please download the PDF or feel free to contact us.

Santelecom Japan, as a top-class agency in KDDI's Kanto corporate sales division, has dedicated representatives who will provide clear and courteous assistance to first-time customers. A corporate contract refers to applying for a contract under the name of a corporation, such as a joint-stock company or a limited company. Our company offers "special corporate pricing" for all scenarios including "new contracts," "device changes," and "switching from other companies." 【Benefits】 ■ Reduction in communication costs such as calls and internet ■ Increased business efficiency with suitable options and plans ■ Centralized management of employee mobile data ■ Improved employee satisfaction *For more details, please refer to the PDF materials or feel free to contact us.

Smartphones and mobile phones have become indispensable tools in business. However, there are many specialized terms that are emerging, and while we may have a general understanding of their nuances, we often do not know their original meanings. This smartphone glossary mainly picks up and lists terms that you might hesitate to ask someone about or that are not widely recognized. When introducing smartphones, there are several points to consider, such as security measures and app selection. We hope this glossary will assist you in your smartphone adoption and operation. *You can view the detailed content of the article through the related links. For more information, please feel free to contact us.*

We would like to introduce the "Corporate Mobile Phone and Corporate Smartphone Rate Plan List" that we handle. The "Smartphone Start Plan Basic 5G/4G" is a recommended plan for those using a smartphone for the first time, allowing data communication of up to 30GB. In addition, we also offer various plans such as the "Smartphone Start Plan Light 5G/4G," "Unlimited MAX 5G/4G," and "Smartphone Mini Plan 5G/4G." 【Plan Lineup】 ■ Smartphone Start Plan Basic 5G/4G ■ Smartphone Start Plan Light 5G/4G ■ Unlimited MAX 5G/4G ■ Smartphone Mini Plan 5G/4G *For more details, please download the PDF or feel free to contact us.

Points will be awarded based on the monthly usage fees and communication charges of the KDDI fixed communication services for au mobile phones. Corporate contract customers tend to accumulate points easily due to having multiple contracts, but they are often unaware of how many points they have. Upon checking, they usually find that they have accumulated a significant amount. Since corporate contract customers have fewer opportunities to use their points, it is not uncommon for points to expire. *For more details on the column, please refer to the related links. For further inquiries, feel free to contact us.

We would like to introduce our "BPO Services." We solve issues related to mobile phones that contain important customer information, such as "I implemented MDM but can't utilize it effectively" and "I don't know what to do when my smartphone breaks." MDM can be managed collectively by our company. Additionally, in case of a malfunction, we can promptly arrange for smartphones and tablets. Remote locking and unlocking of mobile phones is also possible. 【Scope of Services】 ■ Application reception desk ■ Device arrangement ■ Kitting ■ Inquiries and maintenance ■ Device management ■ After-sales support *For more details, please refer to the PDF document or feel free to contact us.

In recent years, many companies have been introducing corporate smartphones and mobile phones to improve business efficiency and enhance security. However, there are likely many personnel who struggle with the kitting process even after the devices have been introduced. Therefore, this time we will discuss the reasons why kitting for corporate smartphones and mobile phones can be challenging, as well as key points to facilitate a smooth process. *For detailed content of the column, please refer to the related link. For more information, please check the PDF document or feel free to contact us.*

In the real estate industry, smooth information sharing is essential to convey the appeal of properties during viewings. If the Wi-Fi environment is not set up during a viewing, the display of detailed property information and videos may be delayed, potentially lowering customer satisfaction. STJ Rental Wi-Fi addresses these challenges by providing a comfortable Wi-Fi environment, facilitating smooth viewings. 【Usage Scenarios】 * Viewing property information during the showing * Displaying videos and VR content * Smooth information sharing with customers 【Benefits of Implementation】 * Increased customer satisfaction during viewings * Smooth communication of property information * Improved closing rates

To enjoy video viewing comfortably in the entertainment industry, a stable Wi-Fi connection is essential. Interruptions in video playback or slow loading times can significantly diminish viewer satisfaction. STJ Rental Wi-Fi utilizes cloud Wi-Fi and aims to provide a stable connection in various locations. This report evaluates its performance through actual usage experiences. 【Usage Scenarios】 * Watching videos while on the move * Streaming videos at event venues * Watching videos outdoors 【Benefits of Implementation】 * Enables video viewing anywhere, without location restrictions * Enhances viewing experience with a stable communication environment * Supports corporate use, contributing to improved operational efficiency

In December 2025, the "Smartphone Software Competition Promotion Act (commonly known as the New Smartphone Law)" was enacted. At first glance, this law seems to be related to "general users" and "app development companies," but it may actually have implications for the operation of corporate smartphones as well. In this column, we will clearly explain "What is the New Smartphone Law?", "What impact does it have on corporate smartphones?", and "Examples of utilizing MDM (OPTiM Biz)." *For detailed content of the column (such as blogs), you can view it through the related links. For more information, please download the PDF or feel free to contact us.

In the construction industry, rapid information sharing and a reliable communication system are essential for site management. Particularly in understanding site conditions, responding to emergencies, and coordinating among stakeholders, the stable operation and management of mobile devices serve as the foundation for executing tasks. Delays in response due to loss or malfunction can lead to project delays and decreased productivity. Our service "MaruMoba" comprehensively supports the management and operation of corporate mobile phones and smartphones, facilitating smooth business operations on-site. 【Usage Scenarios】 - Information sharing between sites - Instructions for the allocation of materials and personnel - Establishing a communication system for emergencies - Coordination with personnel while on the move 【Benefits of Implementation】 - Improved decision-making speed on-site - Reduced communication loss - Enhanced operational efficiency

In the service industry, smooth communication with customers and the accuracy of reservation management are key to performing operations. Particularly, as the volume of business conducted through mobile devices increases—such as checking and changing reservations and responding to customer inquiries—there are often challenges related to device management, security measures, and responses in case of loss. These issues can lead to decreased operational efficiency and lower customer satisfaction. "MaruMoba" is a BPO service that comprehensively supports the management and operation of corporate mobile phones and smartphones, contributing to the resolution of these challenges. 【Usage Scenarios】 - Responding to inquiries during reservation acceptance and changes - Accessing and managing customer information - Checking reservation status from outside 【Benefits of Implementation】 - Streamlining reservation management operations - Accelerating customer response times - Reducing the operational burden on employees

In educational institutions, the smooth distribution of teaching materials and the sharing of information among students and staff are emphasized. In particular, stable operation of mobile devices and a support system for emergencies are essential for quick access to the latest materials and the use of learning support tools. If there are many inquiries about lost devices or operations, it may hinder educational activities. "Marumo" comprehensively supports the management and operation of corporate mobile phones and smartphones, aiding the use of IT in educational settings. 【Usage Scenarios】 - Digital distribution and access management of teaching materials - Communication and information sharing among students and staff - Use of learning support applications - Prompt response in case of device loss or malfunction 【Effects of Implementation】 - Increased efficiency in material distribution and improved accessibility - Reduced management burden on staff - Equalization of learning opportunities for students - Ensured continuity of educational activities through prompt trouble response

In the insurance industry, rapid information gathering and customer response on-site are required, making the stable operation and security of corporate mobile phones crucial. For assessors to share accurate information and make quick decisions while on the go, it is essential to have measures in place for lost or malfunctioning devices, as well as prompt resolutions to user inquiries. To address these challenges and support improvements in operational efficiency and customer satisfaction, "Marumo" provides the optimal solution. 【Usage Scenarios】 - Taking and sharing photos and videos on-site - Secure access to customer information - Responding to inquiries while in transit 【Benefits of Implementation】 - Accelerated assessment operations - Smoother information sharing - Increased customer satisfaction

In the financial industry, maintaining a rapid and secure communication environment is essential for handling customer inquiries and managing confidential information. In particular, responding to inquiries from remote locations and ensuring quick recovery in the event of loss or malfunction are critical for customer satisfaction and business continuity. Inadequate management systems can increase the risk of information leaks and potentially undermine customer trust. "MaruMoba" comprehensively supports the management and operation of corporate mobile phones and smartphones, contributing to the resolution of these challenges. 【Usage Scenarios】 - Responding to customer inquiries from remote locations - Communicating with staff while on the move - Sharing information in emergencies 【Benefits of Implementation】 - Faster and improved quality of customer responses - Reduced risk of information leaks - Enhanced operational efficiency

In the real estate industry, the rapid and accurate sharing of property information leads to improved customer satisfaction and increased operational efficiency. Particularly in on-site property verification and customer interactions, utilizing smartphones and corporate mobile devices for information sharing is essential. However, challenges such as device management, security measures, and responses to loss can become burdensome in operations. Marumo supports the management and operation of mobile devices in real estate business by addressing these challenges. 【Usage Scenarios】 - Taking and sharing property photos and videos on-site - Providing property information to customers - Centralized management of property information within the company - Responding to inquiries while on the move 【Benefits of Implementation】 - Reduction of missed opportunities through real-time sharing of property information - Faster customer responses and increased satisfaction - Alleviation of the burden of mobile device management tasks - Ensuring business continuity through rapid recovery in case of loss or malfunction

In the manufacturing production environment, there is a demand for information sharing between sites, progress verification, and rapid transmission of work instructions. In particular, real-time situational awareness and quick responses to sudden troubles are essential for the stable operation of production lines. However, establishing a communication environment that meets the diverse needs of the site and managing and operating devices can involve significant effort and costs. Our service "MaruMoba" offers management and operation of corporate mobile phones and smartphones as a BPO service, supporting the resolution of these challenges. 【Usage Scenarios】 - Work instructions and progress verification on the production line - Information sharing among on-site staff - Establishing a communication system for emergencies - Streamlining inventory management and quality checks 【Benefits of Implementation】 - Smoother communication on-site - Improved production efficiency - Reduced opportunity loss through rapid decision-making - Decreased management workload

In the logistics industry, real-time understanding of delivery status and smooth collaboration with drivers are crucial for carrying out operations. Particularly in delivery tracking, accurate location information and rapid information sharing directly contribute to improving customer satisfaction and enhancing operational efficiency. Insufficient information sharing and the complexity of device management can increase the risk of delays and misdeliveries. The comprehensive mobile business support service "Marumo" assists in the management and operation of corporate mobile phones and smartphones, contributing to solving these challenges. 【Usage Scenarios】 - Real-time tracking of delivery vehicles - Ensuring communication methods with drivers - Rapid information sharing in emergencies 【Benefits of Implementation】 - Optimization of delivery routes - Reduction of delay risks - Accurate information provision to customers

In the medical field, there is a demand for rapid and secure responses when referencing patient records and sharing information. Particularly during information access while out and about, as well as in emergency situations, it is crucial to manage the risk of information leaks and to prevent business interruptions due to loss or malfunction. In response to these challenges, "Marumo" provides BPO services for the management and operation of corporate mobile phones and smartphones, supporting healthcare professionals in creating an environment where they can focus on their work with peace of mind. 【Usage Scenarios】 - Referencing patient records from outside - Information sharing in emergencies - Business communication while on the move 【Benefits of Implementation】 - Strengthening information security - Improving operational efficiency - Rapid response in case of loss or malfunction

In the food service industry, accurately and quickly receiving customer orders directly contributes to improving service quality. Particularly during peak times, missing orders or delays in information sharing among staff can lead to decreased customer satisfaction and lost opportunities. Additionally, in busy store situations, it is not uncommon to be overwhelmed by the need to address lost or malfunctioning devices. "MaruMoba" supports the management and operation of corporate mobile phones and smartphones, contributing to solving these challenges. 【Usage Scenarios】 - Order reception and communication within the store - Management of takeout and delivery orders - Information sharing among staff 【Benefits of Implementation】 - Faster processing of orders and improved accuracy - Smoother communication among staff - Reduced downtime due to quick recovery from loss or malfunction

Have you ever experienced your iPhone suddenly becoming unresponsive or not turning on? In such situations, a "force restart" can be helpful. This article clearly explains the cases when a force restart is necessary on an iPhone, important points to consider, and the operation method. Additionally, for those who find it difficult to understand the operation method through text alone, we also introduce a video explaining the force restart available on the Santec Telecom Japan YouTube channel "STJCHANNEL." If you want to follow along with the actual operation, please refer to it. *You can view the detailed content of the article through the related links. For more information, feel free to contact us.

Corporate smartphones and mobile phones continue to be managed even after they are arranged for employees. There are actually many detailed tasks involved, including collection, ledger confirmation, initialization, MDM verification, kitting, and delivery. Although each task may seem small, they can accumulate and take up a lot of time in device management. Therefore, this time we will closely follow the field of Santelecom Japan's "Maru-Moba" and take a look at the behind-the-scenes process until the devices are handed over to the next users. *For detailed content of the article, please refer to the related links. For more information, feel free to contact us.