What is the network unlock code for Samsung? Can I unlock my phone for free? A PUK code stands for “Personal Unlock Key.†It's a unique code that is linked to your mobile phone's SIM card and is usually 8 digits long. You will need the …

If you have a phone that you are not exactly sure if it is network opened or otherwise, after that the rapid method to check is by attempting a different SIM card in it. To make use of an additional network on your phone, when you take a t…