Other than the X960, Acer made the previously leaked DX900 official at the MWC 2009. The Tempo DX900 is the world’s first Dual SIM smartphone to support both 3G and 2G networks. THE DX900 is powered by a Samsung S3C 6400 533MHz processor, 128MB RAM and 256MB flash memory.
The DX900 features the same 2.8-inch 640×480 LCD touchscreem, a 3 Megapixel auto focus camera, a front camera for video calls, integrated SiRFstar III GPS receiver, WiFi 802.11b/g, Bluetooth and a microSD card slot. D
X900′s SIM1 slot accpets tri-band HSDPA/UMTS and quad-band GSM/EDGE while the SIM2 slot supports only GSM Tri-Band(900/1800/1900). Acer DX900 comes with G-sensor, L-sensor. It runs Windows Mobile 6.1 with Spb Mobile Shell v2.1 UI.