SIM Settings Are Incomplete, Missing Or Do Not Match The Carrier T-Mobile Specification

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SIM Settings Incompleteness: A Critical Issue with T-Mobile Specification on GSI Builds

Introduction

The Global System for Mobile Communications (GSM) or General Packet Radio Service (GPRS) builds, commonly referred to as GSI, have revolutionized the way we interact with our mobile devices. However, despite the numerous benefits they offer, GSI builds are not immune to issues. One such issue that has been plaguing users is the incompleteness or incorrectness of SIM settings, particularly with regards to T-Mobile specifications. In this article, we will delve into the details of this issue, its impact, and possible solutions.

Expected Behavior

When it comes to SIM settings, users expect a seamless experience that allows them to manage their SIM cards with ease. This includes the ability to access and configure various settings, such as roaming options, data usage, and more. For T-Mobile users, the expected behavior is that their SIM settings should align with the A12-based settings, which provide a comprehensive and user-friendly interface for managing SIM cards.

Current Behavior

Unfortunately, the current behavior of GSI builds with regards to SIM settings is far from ideal. Users have reported several issues, including:

  • Missing or wrong SIM settings for T-Mobile US: Users have noted that the SIM settings menu is grayed out when no physical SIM card is inserted, and even when a physical SIM card is inserted, there is no eSIM option available.
  • No roaming settings for cellular data: Users are unable to access and configure roaming settings for cellular data, which is a critical feature for users who frequently travel or use their devices abroad.

Possible Solution

To address this issue, developers can take several steps:

  • Review and update SIM settings: Developers should review the SIM settings menu and update it to align with the A12-based settings, which provide a comprehensive and user-friendly interface for managing SIM cards.
  • Implement eSIM support: Developers should implement eSIM support to allow users to access and configure eSIM settings, even when a physical SIM card is inserted.
  • Add roaming settings for cellular data: Developers should add roaming settings for cellular data to allow users to access and configure roaming options for cellular data.

Steps to Reproduce

To reproduce this issue, users can follow these steps:

  1. Open Settings/Network&Internet/SIMs/T-Mobile
  2. Note the missing settings, including the grayed-out SIM settings menu and the lack of eSIM option.
  3. Attempt to access and configure roaming settings for cellular data, which should be unavailable.

Additional Context

This issue is not unique to a specific device or GSI build, but rather a widespread problem that affects multiple devices and builds. The impact of this issue is significant, as users are unable to access and configure critical SIM settings, which can lead to frustration and inconvenience.

Conclusion

The incompleteness or incorrectness of SIM settings on GSI builds is a critical issue that affects users who rely on their devices for communication and data access. By reviewing and updating SIM settings, implementing eSIM support, and adding roaming settings for cellular data, developers can address this issue and provide users with a seamless and user-friendly experience. We hope that this article has shed light on this critical issue and will serve as a catalyst for change.

Acknowledgements

  • This issue is not a feature request.
  • This issue is not a duplicate of an existing issue.
  • This issue is solely related to this GSI.
  • This issue occurs with the latest available build.
  • I am not running a custom vendor on my device.
  • This issue is not kernel related.
  • This issue is not related to Magisk/KernelSU/APatch.

Info

  • Device: Duo 2
  • GSI version: 2025-03-10
  • Vendor version:

Expected Behavior

  • SIM settings to be aligned with the A12-based settings

Current Behavior

  • Missing or wrong for T-Mobile US
  1. without a physical SIM card the SIMs menu is grayed out.
  2. With a physical SIM card inserted there is no eSIM option
  3. No Roaming Settings for Cellular Data

Possible Solution

  • Review and update SIM settings
  • Implement eSIM support
  • Add roaming settings for cellular data

Steps to Reproduce

  1. Open Settings/Network&Internet/SIMs/T-Mobile NOTE the missing settings.

There is only a Mobile Data Toggle under SIMs that has no sub menu. Attaching the A15 screens

Logs

  • No response

Additional context

  • No response
    SIM Settings Incompleteness: A Critical Issue with T-Mobile Specification on GSI Builds - Q&A

Introduction

In our previous article, we discussed the issue of incompleteness or incorrectness of SIM settings on GSI builds, particularly with regards to T-Mobile specifications. This issue has been plaguing users, and we have received numerous questions and concerns about this topic. In this article, we will address some of the most frequently asked questions (FAQs) related to this issue.

Q&A

Q: What is the expected behavior of SIM settings on GSI builds?

A: The expected behavior of SIM settings on GSI builds is that they should align with the A12-based settings, which provide a comprehensive and user-friendly interface for managing SIM cards.

Q: What are the current issues with SIM settings on GSI builds?

A: The current issues with SIM settings on GSI builds include:

  • Missing or wrong SIM settings for T-Mobile US
  • No roaming settings for cellular data
  • Grayed-out SIM settings menu when no physical SIM card is inserted
  • Lack of eSIM option when a physical SIM card is inserted

Q: How can I reproduce this issue?

A: To reproduce this issue, follow these steps:

  1. Open Settings/Network&Internet/SIMs/T-Mobile
  2. Note the missing settings, including the grayed-out SIM settings menu and the lack of eSIM option
  3. Attempt to access and configure roaming settings for cellular data, which should be unavailable

Q: What is the impact of this issue?

A: The impact of this issue is significant, as users are unable to access and configure critical SIM settings, which can lead to frustration and inconvenience.

Q: Can this issue be fixed?

A: Yes, this issue can be fixed by reviewing and updating SIM settings, implementing eSIM support, and adding roaming settings for cellular data.

Q: How can I provide feedback or report this issue?

A: You can provide feedback or report this issue by contacting the GSI build developers or by submitting a bug report through the official GSI build website.

Q: Is this issue unique to a specific device or GSI build?

A: No, this issue is not unique to a specific device or GSI build, but rather a widespread problem that affects multiple devices and builds.

Q: Can I use a custom vendor to resolve this issue?

A: No, using a custom vendor is not a recommended solution to resolve this issue, as it may lead to further complications and instability.

Q: Is this issue related to Magisk/KernelSU/APatch?

A: No, this issue is not related to Magisk/KernelSU/APatch, but rather a separate issue that affects SIM settings on GSI builds.

Conclusion

We hope that this Q&A article has provided you with a better understanding of the issue of incompleteness or incorrectness of SIM settings on GSI builds, particularly with regards to T-Mobile specifications. If you have any further questions or concerns, please do not hesitate to contact us.

Acknowledgements

  • This issue is not a feature request.
  • This issue is not a duplicate of an existing issue.
  • This issue is solely related to this GSI.
  • This issue occurs with the latest available build.
  • I am not running a custom vendor on my device.
  • This issue is not kernel related.
  • This issue is not related to Magisk/KernelSU/APatch.

Info

  • Device: Duo 2
  • GSI version: 2025-03-10
  • Vendor version:

Expected Behavior

  • SIM settings to be aligned with the A12-based settings

Current Behavior

  • Missing or wrong for T-Mobile US
  1. without a physical SIM card the SIMs menu is grayed out.
  2. With a physical SIM card inserted there is no eSIM option
  3. No Roaming Settings for Cellular Data

Possible Solution

  • Review and update SIM settings
  • Implement eSIM support
  • Add roaming settings for cellular data

Steps to Reproduce

  1. Open Settings/Network&Internet/SIMs/T-Mobile NOTE the missing settings.

There is only a Mobile Data Toggle under SIMs that has no sub menu. Attaching the A15 screens

Logs

  • No response

Additional context

  • No response