If your mobile phone is locked it will need to be unlocked before it can be used with a SIM card from any network other than the one you’ve signed up with.

One common issue that some users face is their new phone not accepting their SIM card, requiring an unlock code. We will cover various methods to obtain the unlock code and troubleshoot your SIM ...

We’ve used Android SIM Unlock several times, but most similar services work the same and offer similar prices and a refund guarantee if the code they provide does not work for your 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 Network lock says ON, then your Samsung device is network locked. If Subset lock is ON, then your Samsung device has to be unlocked and requires a code from the original carrier.

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!