T-Mobile USA recently began selling the ZTE Aspect, an entry-level monoblock QWERTY device for messaging, on its web site. The Aspect features a 2.4-inch QVGA display, 3-megapixel camera, Bluetooth 2.1+EDR, and support for microSD memory cards. The Aspect, which is sold by AT&T as the Z431, runs a proprietary operating system and offers basic messaging and calling functions. The ZTE Aspect costs $69.99 and does not require a contract. It is compatible with T-Mobile's prepaid monthly service.
Source: Phone Scoop