New iPhone 12 mini won't verify my number for iMessage and Facetime
After setting up my new iPhone, it would not Verify my number for iMessage and Facetime. It seems that the new Sim card is not recognized. I called Tmobile to change the IMEI number and the ICCID number from the old iPhone 6 to my new iPhone12 mini. After this the old phone was inactivated and the new phone showed up on the Tmobile plan. I turned off iMessage and Facetime, reset the Network Settings, and then restarted iMessage and Facetime. It still says "Verifying" next to my phone number under iMessage Send and Receive. Facetime has the same error. I assume this is a Tmobile issue not an iPhone issue, but does anyone know and secret keystrokes that will Verify me?
iPhone 12 mini, iOS 14