VoLTE provider support

bundyo · 5 October 2022 21:20

After some fiddling (4.4.0.72), got my Bulgarian provider Yettel running on VoLTE. A bit of a problem since it wasn’t listed in getprop. So, in order to find your VoLTE SIM config ID, check this XML:

github.com

MarijnS95/SonyOpenTelephony/blob/master/ModemConfig/res/xml/service_provider_sim_configs.xml

<service_provider_sim_configs>
  <service_provider_sim_config sim_config_id="S6.1">
    <mcc>208</mcc>
    <mnc>26</mnc>
    <gid1>31</gid1>
  </service_provider_sim_config>
  <service_provider_sim_config sim_config_id="S6.2">
    <mcc>208</mcc>
    <mnc>01</mnc>
    <gid1>31</gid1>
  </service_provider_sim_config>
  <service_provider_sim_config sim_config_id="S6.3">
    <mcc>208</mcc>
    <mnc>10</mnc>
    <gid1>31</gid1>
  </service_provider_sim_config>
  <service_provider_sim_config sim_config_id="S6.4">
    <mcc>208</mcc>
    <mnc>20</mnc>
    <gid1>31</gid1>

This file has been truncated. show original

As you can see, the providers are listed by their MCC/MNC and no names. To find a provider MCC/MNC, you can either check your CSD or NetMon tools on the phone, or check some provider listing, for instance this one in Wikipedia (first three numbers are MCC, the rest - MNC):

Since my provider was Telenor, before they sold it to Yettel, I just copied the Telenor Norway config (S260.1) to a new Yettel one (S232.1)

Country: BG
Provider: Yettel
Device model: 10 II
Registered: ✓
Voice in: ✓
Voice out: ✓
SMS in: ✓
SMS out: ✓

Have fun finding yours.