Nokia Lumia 520 is an amazing Windows Phone 8 device at such an affordable price. Unlike iPhone unlocks, Nokia Lumia 520 uses an Unlock code to free it from carriers it is locked to (AT&T in the USA).
What makes Nokia Lumia 520 a popular phone is the one too many black friday deals that popped up in 2013. It is a no-frills get the job done phone. It has a very cool interface and Nokia’s offline maps which is amazing! All this for a cool $50~$60 is a no brainer!
Now, how do we unlock this device for use overseas or locally on an unsupported carrier? You either have an option to request the carrier (AT&T in USA) for the unlock code which is next to impossible within the first year since it is a GoPhone (AT&T prepaid). This is when a reliable 3rd party unlocker comes into the picture. Enter http://www.theunlockingcompany.com! It took about a week to get the unlock code and it worked great! Following is the step by step guide that I shot for YouTube.
Here is the coupon code for 10% at theunlockingcompany.com : phone10