Hello,
Few days ago, canadian operators does not support anymore 3G or 2G networks. I cannot make a call using 4G LTE network because, AFAIK, VoLTE capability is not activated in the MediaTek MT6762 modem : Canadian operators seem to be not registered in this modem then IMS feature is not provisioned by my operator. Also, these operators manage a whitelist where MT6762 modem is not there.
However, the hardware supports VoLTE capability and IMS stack. The first step is to force VoLTE to be activated but I cannot find it in the settings nor in developer settings. It could be straight to make tries using root access but it is not available using adb tool.
Can someone help here ?
Thanks
Kospet Optimus 2
FAW firmware v1.3
So, I examined this problem.
I succeeded to root with the original 1.8 firmware (SP Flash Tool, Magisk, VoLTE enabler). Then I used these commands to access the MediaTek modem GUI:
adb shell
su -c "am start -n com.mediatek.engineermode/.EngineerMode"
I did not find my operator in the MBN profile list but I saw others I know here. Also I did not find also a generic profile. I tried to diagnose the issue:
su -c “logcat -b radio | grep -iE ‘IMS|VoLTE|SIP|forbidden|reject|302500’”
I saw in this log that the operator network rejected my device and did not grant the 4G calling: error code 63. It means that the Home Subscriber Server managed by the operator rejected access to VoLTE service even if my SIM card was correctly recognised. However my operator refused to provide a MBN profile for the MediaTek modem and to add my IMEI in his white list.
At this point, I had no other choice to go Canadian operators I saw in the MediaTek configuration. One of them accepted to try in their workshop and … bingo … 4G calling works. My Optimus will continue to live for a while as my unique mobile phone.
Thanks.
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