24 month contract with Unlimited 5G Data. O2 Priority, Charge to mobile, Recommend a Friend and Earn Rewards, O2 Wi-Fi Hotspots, No speed caps, Wi-Fi Calling, eSIM Compatible. The Samsung Galaxy S25 Ultra 5G comes with a 6.8-inch touchscreen with 505PPI. It packs a 200-megapixel rear camera and a 12-megapixel selfie camera. It is all powered by the Qualcomm SM8650-AB Snapdragon 8 Gen 3 (4 nm) chipset and 12/16GB of RAM.