Question

Is there a function to notify users when the mobile setting are switched to those with a lower priority due to a carrier failure, etc. during mobile communication?

Also, are there times when the mobile settings will automatically return to those with a higher priority when recovering from a failure?

Answer

There is no function to notify users when the mobile settings are switched to other ones.

By checking the communication status on a regular basis, you can understand which mobile communication is being used.

• CLI User's Manual (Japanese)
  5.3 モバイル回線の通信ステータスを表示する

Also, even when recovering from a failure, if the signal strength is maintained in the mobile settings after switching, the mobile settings will not return to those with a higher priority automatically and communication will be continued without changing the settings.

• Related FAQ
  If using multiple SIMs, which one will be prioritized and connected to?