Entering a wrong PUK code ten times in a row disables the SIM card permanently. Both the PIN and the PUK codes are supplied by the operator, but only the PIN code can be changed by the user.

Done with a long term contract or looking to switch network carriers but keep the phone? Here's everything you need to unlock your Vodafone UK phone!

How to Unlock the PUK Code on a Mobile Phone If Locked?. GSM phones give you the option to set a PIN code on the SIM card as a security measure. If you only set a phone lock and you lose your ...

A PIN can log you into your computer faster than a password. Here's how to create one in Windows 10.

How to Reset Your M-PESA PIN If you have forgotten your current M-PESA PIN or you just need to change it, you can reset it using USSD code 334#.

If you're looking for a more efficient way to lock and unlock your Chromebook screen, here's how to do that with the help of the developer channel and PIN unlock.

If you forget the iPhone's PIN or passcode, you'll be locked out - here's how to unlock a disabled iPhone or iPad.

A new developer update lets you unlock your Chrome OS with nothing more than a PIN.

You now have an iPhone 3G that will run on any network. One note -- you'll need the latest baseband firmware for the iPhone, numbered 02.28.00, and you'll have to disable the PIN unlock code on ...