HTC was running a promotion a while back allowing you to trade in your old smartphone to receive a $100 credit on your purchase of a new AT&T Tilt 2. When the in-contract/after-rebate price was $349, $100 off helped significantly. Shortly after that promotion expired on January 31st, AT&T dropped the in-contract price of the Tilt 2 to $199 (after $50 rebate). Well, HTC has decided to restart the promotion, running it again until April 30th (beginning 2/11). Simply put, they will give you a $100 credit to send them your old smartphone (“To qualify for the promotion you must trade-in a working smartphone made by BlackBerry®, an Apple® iPhone, a Palm device by Palm, a Nokia smartphone or any device running on the Windows Mobile® or AndroidTM operating system.”) The list dates back several generations of phones, so be sure to check out the current promotion by clicking here.