My SIm cards seem to have had the option to disable the PIN code disabled. I have tried several different phones. On connecting to the phone network I enter the pin code and it's accepted no problem. But when I try and disable the PIN code lock, it wont work. It either says, not supported, or wrong pin code. I am entering the correct PIN, many many times! I have tried this in Android Kit Kat, GB, Win 6.5 and an old Nokia. Always the same result.
Could this be locked by the network operator so it cannot be removed? Is there a work around?
I have tried to search, but have not found an answer.