Who called from 4143754745

This number called my cell.  I didn't answer it and they did not leave a message either.

answered and got a message saying it was from T-Mobile and there has been a change in my service. Dont know if its real or not as I have not asked to change my service

Log into your online T-Mobile account, or call T-Mobile customer service, to see if it is true.
Do NOT use any phone number that caller might have given you.