AT&T and Nokia are expected to unveil the Nokia Ace during next week’s Consumer Electronics Show, reports claim. The Ace will also be known internationally as the Lumia 900 and Pocketnow published a few new details on the new flagship phone on Tuesday morning. We already exclusively reported that the Lumia 900 will pack a 4.3-inch ClearBlack AMOLED display, a 1.4GHz processor and an 8-megapixel camera, and Pocketnow says it will also offer 512MB of RAM and a large 1,830 mAh battery. Early rumors suggested the phone would require Windows Phone Tango to support AT&T’s 4G LTE network, but the device will allegedly still run Windows Phone 7.5 (Mango). The image used above is simply a mock-up of what the Lumia 900 (Ace) is expected to look like next to the current Lumia 800 handset.