Anyone help on this, daughter just got sky broadband in November and had problems with calls on her iPhone and she just found out it was because she had WiFi calling switched on, so switched it off and all is fine. I went to hers yesterday with my iPhone and got the same problem very slow data and no voice calls so while I’m there I switched my WiFi calling off and everything works again. So googled and I found out WiFi calling won’t work if you didn’t buy the phone direct from sky. So does this sound correct before I get her to raise an issue?