Setup: 1. Ensure your Galaxy S25 Ultra is clean and free of debris. 2. Gently slide your phone into the transparent Flipsuit Case, ensuring all corners are snug and secure. 3. Locate the designated slot on the back of the case for the interchangeable NFC content card. 4. Insert your desired NFC card into the slot. Ensure it is fully seated and aligned. 5. The phone's NFC feature should automatically detect the card and update your lock screen and Always On Display. If not, briefly touch the card area on the back of your phone to activate NFC. Compatibility: This Samsung Flipsuit Case is specifically designed for the Samsung Galaxy S25 Ultra. It is not compatible with other Galaxy S series models or smartphones. Care: To clean your Flipsuit Case, remove your phone from the case first. Wipe the case with a soft, damp cloth, using mild soap if necessary. Avoid harsh chemicals or abrasive materials that could damage the TPU or the NFC card. Allow the case to air dry completely before reinserting your phone. Keep the interchangeable NFC cards clean and dry, and store them safely when not in use.