FP3 Caller ID and 4G

[yvmuell]

Well it does not seem to be that clear and the provider has its part as well

How to enable VoLTE and WiFi Calling

Yes it is booked into 4G. As I work for a telco I was able to contact a colleagues at Sunrise UPC who works in the mobile department and learned that they have tested the Fairphone 4 and found Issues with VoLTE, Wifi Calling and 5G. Therefore they intentionally disable those features when a Fairphone 4 logs into their mobile network. They are in contact with the manufacturer of the Fairphone 4 to solve those issues but it has no priority as this is not a phone they sell or advertise themselves…