VOLTE not working on Android 11 - worked before on Android 10


Nov 13, 2020
Since Android 11 - votle has not worked with my carrier Telstra in Australia.
Previously on Android 10 - it worked perfectly using the volte USSD codes.
I have flashed all 12.2.x.0 firmwares and tried latest xiaomi.eu both stable and weekly no dice on Android 11.

Does modem test tools work on Android 10? I would like to compare it to Android 11.

Installed this on stock and it gave this output, … I'm not sure because it said parts of the operation is prohibited or the null items aren't correct - but can't be certain.

Does any one know if the output is correct? If anyone could share an output the same as I did it would be greatly appreciated.


  • mbm config.jpg
    mbm config.jpg
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