1. Before use, please test the water resistance of the Tempered Glass iPhone 14 Pro Max waterproof case according to the user manual. Make sure all ports are completely sealed. Make sure it passes the water test. 2. Please review and check the user manual to ensure proper installation. Tempered Glass iPhone 14 Pro Max Waterproof Case 3. You can only use the shortcut keys to take photos or videos while diving. The screen cannot be used due to water pressure 4. Is the original size charging cable correct? Please pay attention to the width of the charging cable. If the width of the charging cable is longer than the charging port of the phone case, the charging cable may not be able to charge the phone directly 5. The case has a built-in screen protector, the extra screen protector will make it difficult to touch the screen, please note, thank you very much! 6. Any product may have defects in production, More than just a case,but more of insurrance. For any issue, you are always free to find us. These are the steps to find the seller: "Login Amazon" → "Your Account" → "Your orders" → "Ask Product Question", we are gonna give you an efficient and perfect solution. You are always the first for us.