The angular, black plastic Gem is a full touch-screen Android 2.2 Froyo handset. It has a 3.2-inch screen, a 3.2-megapixel camera, and it'll cost $139.99.
The heavier HTC Merge has metal accents, also runs Android 2.2, has a 3.8-inch touch screen, a 5-megapixel camera, a slide-out QWERTY keyboard, and dual-SIM mode for world travel. It costs $299.99.
U.S. Cellular's prepaid plans range from $40 to $70; the carrier is currently waiving the activation fee for plans $50 and up.