I am so frustrated and upset! My iphone 7plus keeps locking my SIM and then it asks for a PUK code. What is a PUK CODE???? and why do they keep doing this. I went to T-MOBILE this week and they unlocked. I set a new passcode for PUK while I was there. I shut my phone off yesterday, and when i opened it again, I got locked out AGAIN! I tried to code that I made, and it DID NOT WORK...then it asked me for a PUK CODE AGAIN and was unsuccessful. I AM LOCKED OUT AGAIN and it is frustrating because I have now spent another 8 HOURS trying to learn how to unlock without having to make ANOTHER TRIP to the TMOBILE STORE. I am paid up on my bill. SO WHY IS THIS HAPPENING?!? I only have this one phone. It asks to call TMOBILE, but I cant call because the phone will not allow me to call. I have LOST jobs, money and have many upset because I did not get there messages. PLEASE ADVISE!
If you still have the sim card holder that came with the sim it will be on it.
Otherwise you'll have to call or contact Tmobile through facebook or twitter to get the code.
i have my SIM card and PUK code but when i put it in it then asks me for a "new SIM card PIN" and if i type in a pin it says it's wrong.
Manage your T-Mobile account