Confused why you can't put a Curve 8900 into your cart on T-Mobile's site right now? Well, turns out there's a mighty simple explanation for that -- it's discontinued. We've just gotten official confirmation from the carrier that the phone has "reached the end of its life-cycle," so that's that. Might we recommend the Curve 8520 or Bold 9700 in its stead?

[Thanks, Eric]