Buy the HTC One X, trade in your old Apple iPhone and HTC will give you a free urBeats headset21
will send you cash for your old Apple iPhone if you purchase an HTC One X. Check out the price calculator on the HTC website to see how much you can receive for your older iPhone. The Apple iPhone 4S in 16GB will bring you a $210 payment while an OG 16GB Apple iPhone will fetch you $15.
If you're buying the HTC One X and you have an older model Apple iPhone, the choice is yours. HTC will give you either cash, or the urBeats earphones. As for what HTC intends to do with all of those old units of Apple's iconic smartphone, we can't say for sure but we wouldn't be surprised to hear about a huge bonfire in Taiwan at the end of next month.
source: HTC via Phandroid