Sprint iPhone x. Apple store purchase. ?unlocked
I bought a Sprint iPhone x 64gb from a friend. He purchased a Sprint iphone x from the apple store (he gave me the receipt). Paid in full. According to the apple website all iPhone x models are unlocked. The phone was still sealed and never used. I opened the box and placed my Tmobile SIM in the phone, however the phone would not activate. The message indicated it is the incorrect carrier sim. What is the best solution here? Do I need to put in an activated Sprint sim to activate then it will be unlocked to use on any carrier? Sprint has to do something to the phone? Apple can help?