6.8", 1440 x 3200 pixels, Dynamic AMOLED 2X, 120Hz, HDR10+, 1500 nits (peak), 5000mAh Battery 128GB ROM, 12GB RAM, No SD Card Slot, Qualcomm SM8350 Snapdragon 888 5G (5 nm), Octa-Core, Adreno 660 Rear Camera:108MP, f/1.8 + 10MP, f/4.9 + 10MP, f/2.4 + 12MP, f/2.2, Front Camera: 40MP, f/2.2, Android 11, upgradable to Android 12, One UI 4.1 CDMA 800/1900, 3G: HSDPA 850/900/1700(AWS)/1900/2100, CDMA2000 1xEV-DO, 4G LTE: 1/2/3/4/5/7/8/12/13/14/18/19/20/25/26/28/30/38/39/40/41/46/48/66/71, 5G: 2/5/25/41/66/71/260/261 SA/NSA/Sub6/mmWave - Single SIM AT&T Locked cellphones are not compatible with other GSM carriers or CDMA carriers such as T-Mobile, Verizon and Straight Talk. Epic in every way - Meet Galaxy S21 Ultra 5G. The highest resolution photos and video on a smartphone. A blazing-fast processor. First ever S Pen compatibility. It's an Ultra that easily lives up to its name. A camera so good, everyone’s a pro. Snap super high-res stunners. Find beauty with the most powerful zoom on a smartphone. And capture studio-quality portraits. Now S Pen plays nice with Galaxy S. The first Galaxy S smartphone compatible with S Pen adds a new level of precision to your creative pursuits.