from web site
Apart from permitting the owner the ability to choose from a range of networksrather than just their current one, there is a few other good reasons why you might prefer to factory unlock your smartphone even before your contract ends. For anybody who is going overseas as an example, you may decide to take advantage of a local SIM-card whilst you're there to stay clear of heavy roaming fees. Or maybe you've decided to sell your phone then you'll probably get a higher price and a lot more interest in a cellphone that's free to work with with just about any network.
Absolutely nothing is criminal about unlocking your smartphone. It is your phone and you are therefore within your legal rights to make use of it with any carrier you want. Unfortunately, there is a chance factory unlocking your mobile phone may void your warranty, so it might be best to hold-off until you have finished your contractual obligations before deciding to abandon your current provider.
As soon as your cellphone is unlocked, you're ready to locate the lowest priced mobile packages available - a sim-only package. All of these usually work on a rolling monthly basis, meaning you can use the package provided you are content with your cellphone and then up date when a new device is released or your outdated smartphone inevitably bricks itself.
If you are uncertain who you can trust, I highly recommend Unlock.Zone. They offer unlocks for all major makes and networks, give a guaranteed price match promise, plus above all, have a 100% refund policy in the unlikely event they cannot unlock your cellphone. I have used them myself personally and was very happy with the service I received and ultimately that they successfully unlocked my cellphone.
To visit them, click this link: Cellphone Unlock