Not sure what this Sony Ericsson 123 prototype is, supposed to be the successor of W880, the W890. The W890 walkman phone is said to have 2-inch QVGA display screen, 3.2-megapixel camera with autofocus, Bluetooth and a secondary camera for video calls. The phone also said to supports UTMS connection and it has a slim body like the W880, measures at 12mm thick.

[via New Launches]