No 4G / 5G connection Sunrise Switzerland

[yvmuell]

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…

It seems VoLTE and VoWifi was fixed, but not 5G

Known reproducible and reported issues of the Fairphone 4 - Wikimetadiscussion

Last release (mid-march) freed VoLTE and WifiCalling, but not 5G (Swiss Sunrise UPC) Build: FP4.FP3S.A.0103.20220221