Latest Motorola Primus user agents:

User Agent	Browser	Platform
Mozilla/5.0 (Linux; U; Android 2.3.6; es-us; XT621 Build/5.5.1Q_PRIMUS_MR-217) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1	Android Browser	Android 2