Reyman1908 , via OnePlus 7 Pro , Aug 10, 2021 : I just unintentionally locked my second sim on my OnePlus 7 pro. My first sim is still working, but stuck on the screen entering PUK/PUC code for my second sim. Even if i restart my phone its still asking for the PUK/PUC code of my second sim at the starting lock screen. How do I change to the first sim at this point (lock screen)? When I put out the second sim then it is just asking for the pin of the first sim and it unlocks the phone. When I put in the second sim again I will be asked for the PUK PUC code and it is stuck again on the lock screen. Please need help. I will put in my second sim so I won't loose it.