I recently switched from Verizon to T-Mobile. I have an iPhone 15 and a Series 6 watch with cell service.
Nobody has been able to figure out why I can receive/send text messages on my Apple Watch while out of range of my iPhone but cannot make or receive phone calls. Any tips on how to resolve this issue. To date, T-Mobile has not been able to figure it out. Worked perfectly while on Verizon plan.