Is it about time to renew your phone contract? AT&T is hoping to entice you into signing with them with a 50-percent discount on the iPhone, HTC One, Galaxy S4, Blackberry Z10, or any phone between $99 to $199.99 at their stores. Sound good?

All you need to do is sign a two year contract online, and if you want to do it at an AT&T store, you'll need to trade-in your old phone, which needs to be no more than three years old. You can still trade-in your phone online to get credit at AT&T with their "promotion card." This is a limited-time event, so start saying your good-byes to that iPhone 4 of yours. Remember, Best Buy is putting on their own trade-in event until Saturday, which might fit your needs if AT&T's doesn't do it. Also, Walmart is currently offering the iPhone 5 for $129 and the iPhone 4S for $39, if you sign a two-year contract with a carrier.

[via Mashable]