Originally published at: http://www.howtogeek.com/173049/how-to-unlock-a-locked-cell-phone-and-why-you-might-want-to/
Most cell phones sold in North America — especially on contract — are “locked” to a particular cellular carrier. They can only be used on that carrier’s network, so you can’t switch to another carrier without “unlocking” it first.
Most cell phones sold in India are sold unlocked — mainly because we're used to paying full price for phones. Airtel, a carrier here, launched the iPhone on contract, but somehow people are using more Droids than ever.
Title of article: "How to unlock cell phones"... Article tutorial: "Call and ask nicely"... Lol nice