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authorflawedworld <flawedworld@flawed.world>2022-05-04 00:19:17 +0100
committerDaniel Micay <danielmicay@gmail.com>2022-05-03 19:26:42 -0400
commitd4c56f74aba3accd77902318a185770d9f1b87c6 (patch)
treefb6a886f714a611640a3c2ab7539582f65882c33
parentd2fc01a1543009467c8d187bd6eda49d7bd14548 (diff)
Document GSMA TS.43 carriers
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It is not possible to change the IMEI on a production device and GrapheneOS will never add
support for this.</p>
+ <p>Android 12 introduced support for the <a href="https://www.gsma.com/newsroom/wp-content/uploads//TS.43-v8.0-2.pdf">GSMA TS.43</a> standard, where provisioning for VoLTE,
+ VoNR, Wi-Fi calling may be handled by Google Firebase. Currently it is very rare for
+ carriers to be using Firebase to handle this. It is unlikely, but technically possible, that
+ with such carriers, you may be required to install sandboxed Google Play in order to obtain the
+ former mentioned functionality where the carrier has not implemented fallback provisioning via SMS.
+ Currently only US Cellular, Orange France, Cspire US, Cellcom US are using this standard.</p>
+
<p>GrapheneOS includes bypasses for carrier restrictions on APN editing, tethering via
USB, Ethernet, Bluetooth and Wi-Fi and the ability to disable 2G, actions which would not
necessarily have been possible on the stock operating system.</p>