I bought this HTC U23 Pro, inserted new sim card from UPC/Sunrise and don't recognise the calls. Everything comes in as Unknown on the home screen. UPC/Sunrise has checked the sim card, everything is fine. It should be a setting in the device. Can anyone help me why I don't see the clip, why everything is unknown? It would be enough if I could at least see the phone number to call back in case of absence....

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Hei sleutert,

Were you able to fix the problem?
Can you briefly post how you did it ;) 1-2 sentences :P

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Hello
SIM tested in 2nd slot? Deactivate VoLTE and WIFI Calling...
Otherwise I can only repeat what my colleague as a self-confessed HTC fanboy said: "What a shitty phone".

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