Nokia Lumia 820 8GB GSM 4G LTE Windows 8 Smartphone - Black - AT&T - No Warranty Display: AMOLED 480 x 800 pixels, 4.3 inches (~217 ppi pixel density) Internal Memory: 8 GB storage, 1 GB RAM Camera: 8 MP, 3264x2448 pixels, autofocus, Carl Zeiss Tessar lens, F2.2, dual LED flash CPU: Dual-core 1.5 GHz Krait GPU: Adreno 225 OS: Microsoft Windows Phone 8