Replacement of back glass and it is still waterproof

Did you say you put your phone in water to take pictures? You should NEVER submerge ANY iPhone in water. iPhone is NOT waterproof and it never has been. It is water resistant, but water can and will definitely damage the phone, which cannot be repaired. Further, Apple does NOT replace the back glass on iPhone as it is fused on and can't be replaced. You'll have to purchase an out of warranty replacement.

You're welcome, but it's not my opinion about putting your iPhone in water. Water can and DOES damage iPhone. And you CANNOT replace the back glass on your iPhone. Apple won't do it. Authorized Service providers won't do it. You're only option is to replace the phone. Apple will offer a lower cost out of warranty replacement at about 60% of the price of the phone when new. If you have AppleCare+ the price is much lower.

The iPhone is not waterproof. It wasn’t before the glass replacement, it is not waterproof now. If you have been using the phone in water, you have been very fortunate.

Apple will not attempt a repair on the rear glass and the entire device must be replaced.