can't make or receive calls
I have a AT&T HTC one, and I put a T-mobile SIM card. It worked well.
But then, I decided I would rather switch to AT&T, got an AT&T SIM card and my numbered transferred.
Now everything works except the calls... My text messages , data network with 4G LTE, signal is at max most of the time, everything is fine...
The problem is that I soon as I want to call, the phone is stuck on "dialing" and then it hangs up... I cannot receive calls, my phone does not ring or anything when someone tries to call me. However, I send and receive text message with this same phone number and phone without any difficulty.
I know it comes from the phone, as it works well if I put my SIM card into another phone.
I tried EVERYTHING including full rebooting, calling AT&T assistance for almost 2 hrs...
Please help me !
I have a AT&T HTC one, and I put a T-mobile SIM card. It worked well.
But then, I decided I would rather switch to AT&T, got an AT&T SIM card and my numbered transferred.
Now everything works except the calls... My text messages , data network with 4G LTE, signal is at max most of the time, everything is fine...
The problem is that I soon as I want to call, the phone is stuck on "dialing" and then it hangs up... I cannot receive calls, my phone does not ring or anything when someone tries to call me. However, I send and receive text message with this same phone number and phone without any difficulty.
I know it comes from the phone, as it works well if I put my SIM card into another phone.
I tried EVERYTHING including full rebooting, calling AT&T assistance for almost 2 hrs...
Please help me !