I have had the same Simple Choice plan with T-Mobile for many years, and have never had any issues with making international calls when abroad (over wifi or otherwise). I am currently in Cyprus for several months (where I have been before, and, again, never had any issues) and suddenly I am unable to make and receive phone calls. Texts are working. The calls seem to go through, but both parties are unable to hear anything. I have turned on data roaming, I have enabled wifi calling, and I have attempted to call the international t-mobile support number, but even this call does not go through.
Suggestions for how to fix this? Ideas for how to get a hold of someone at t-mobile to troubleshoot? Thank you in advance!