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As well as enabling a consumer the ability to take a look at a wide range of providers, there is a couple of other good reasons why you might wish to SIM unlock your mobile before your contract ends. In the event you're heading to foreign countries for instance, you'll probably decide to work with a domestic sim-card when you are there to stay clear of heavy roaming prices. Or maybe if you've decided to sell your phone then you'll probably get extra money and even more interest in a mobile that's free to work with with almost any carrier.
Nothing could possibly be unlawful about unlocking your cellular phone. It's yours and you are clearly within your rights to use it with any carrier you wish. Although, there's a good chance that factory unlocking your mobile is going to end your warranty, so it might be best to hold off until you have completed your contractual obligations before deciding to ditch your current network.
Several networks will likely not chargeyou for unlocking support while some others may well charge about $60. It's also worth bearing in mind that each carriers has different policies pertaining to how long you have had your regular or SIM only agreement for and how to get your mobile phone unlocked. Just about all carriers have online forms to submit a official unlocking request, but a few will need you to phone their helplines. Just how long it can take to unlock your phone once again can vary greatly between each network. In the UK, EE for example, will unlock an iPhone in a week, while Sky Mobile state it may well take up to 30 calendar days to unlock sim locked handsets.
If you are unsure which business you can trust, I highly recommend Unlock.Zone. They offer unlocks for all major makes and carriers, offer a guaranteed price match promise, plus above all, offer a no questions asked refund policy in the unlikely event they can't unlock your smartphone. I have used them myself personally and was very happy with the service I received and ultimately that they successfully unlocked my phone.
Here's a link to their home page: Cell Phone IMEI Unlocking Service