[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 ...

When enabled, the PIN is required to activate the SIM card ... simply find the packaging and enter the provided PUK code. Unlock the SIM Card without a PUK code However, if you lose the SIM ...

Your phone's SIM card allows the device to make calls, send texts, and connect to the internet. The SIM card provides a phone number that identifies your device on the carrier's network, whether ...

A PUK code is required if a GSM SIM card was locked after entering the wrong PIN code three times in a row. Entering a wrong PUK code ten times in a row disables the SIM card permanently.

How to update an unlocked phone without the SIM card If you’ve requested an unlock from your carrier, but have not got the original SIM card, or if you have acquired a locked iPhone from someone ...

In GSM mobile phones, the PIN is normally associated with the SIM card (not the phone) and must be entered each time the phone is switched on. If a wrong PIN is entered three times in a row the ...