CarrierConfig VoLTE / VoWiFi

[devsx]

Hi all

I'm running a Nexus 6P on a carrier which does not support volte / vowifi officially. But I managed to get all the specific values for this carrier. But the big question is, how to implement those values into the phone?

I did some research and found out that some parameters are specified in the carrierconfig app. An example:

<?xml version='1.0' encoding='utf-8' standalone='yes' ?>
<carrier_config_list>
<carrier_config>
<int name="vvm_port_number_int" value="1808" />
<string name="vvm_destination_number_string">122</string>
<string name="carrier_vvm_package_name_string">com.tmobile.vvm.application</string>
<boolean name="carrier_volte_available_bool" value="true" />
<string name="vvm_type_string">vvm_type_cvvm</string>
<boolean name="carrier_volte_tty_supported_bool" value="false" />
<boolean name="carrier_wfc_ims_available_bool" value="true" />
<boolean name="carrier_ims_gba_required_bool" value="true" />
<int name="maxMessageSize" value="1048576" />
<int name="maxImageWidth" value="2592" />
<int name="maxImageHeight" value="1944" />
<int name="volte_replacement_rat_int" value="3" />
</carrier_config>
</carrier_config_list>

Search for platform/packages/apps/CarrierConfig to find it

So I tried to decompile the carrierconfig app and add my carrier aswell, but unfortunately I can not install the app again (parsing error, defect package). But where is the rest of the data stored (P-CSCF address, used algorithms, ePDG address and so on) ?? How was VoLTE / VoWiFi Calling brought to AOSP roms for EE and T-Mobile USA??




Thanks for your help!