This app allows you to unlock your Samsung phone without having to root your phone. You just have to download this service, and you will be able to unlock your SIM card regardless of your phone's model. It will give you the code associated to your phone that you can use without cables, software, or any technical knowledge.

Note that unlocking code delivery is a paid service, since this app merely distributes codes from the manufacturer database. You should also ensure that your phone is asking for the network unlocking code when you insert a SIM card of a different carrier.