If your SIM card is locked and requesting a PUK code, simply find the packaging and enter the provided PUK code. Unlock the SIM Card without a PUK code However, if you lose the SIM packaging and ...
[Jason Gin] wanted to reuse the SIM card that came with a ZTE WF721 ... he was able to work his way backwards and determine the unlock command and its PIN code. It turns out the PIN was even ...