Enabling VoLTE or VoWIFI when using a Play Polish SIM (MCC 260 MNC 06) with any software so far on Shiftphone 8.1 results in Caller ID not working, always returning Unknown for the phone number. This includes new 7.0L software. The phone does register both for VoLTE and VoWIFI fine and they work otherwise.
I have contacted the operator in this matter and they tell me the phone itself needs some sort of radio setup in it, and as they don't offer it they cannot support it themselves.
Considering what I know about implementation of this in mobile phones, they probably mean the vendor software has wrong SUPL information for the operator.
On an unrelated note, the vendor security version and kernel version is just ancient in every software I tried so far for this phone. It'd be nice to get a GKI 2 compatible one - this old one is full of security holes even though Qualcomm tried patching some of them.
Note: I'm much better at English than German, but if you strongly prefer that, I can oblige.
I have contacted the operator in this matter and they tell me the phone itself needs some sort of radio setup in it, and as they don't offer it they cannot support it themselves.
Considering what I know about implementation of this in mobile phones, they probably mean the vendor software has wrong SUPL information for the operator.
On an unrelated note, the vendor security version and kernel version is just ancient in every software I tried so far for this phone. It'd be nice to get a GKI 2 compatible one - this old one is full of security holes even though Qualcomm tried patching some of them.
Note: I'm much better at English than German, but if you strongly prefer that, I can oblige.