PUK is the code required to unlock a GSM SIM card that has disabled itself after an incorrect PIN code was entered 3-5 times in a row. If an incorrect PUK code is entered a certain number of times ...

A PUK code for a SIM card, which stands for Personal Unblocking Key, is an eight-digit code that enables a blocked SIM card to be unlocked.

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.

Get the PUK Code of your Reliance Jio SIM card from the simple steps that we have mentioned over here.

O2 is offering users a quick and easy way to unlock mobile phones with a personal unblocking code (PUK) which they can get online simply by typing their mobile number into the O2 website.