Is it possible for someone to sell me a used iphone but its actually old hardware in new shell, so it looks like ax X but is not?

Is it possible for someone to sell me a used iphone but its actually old hardware in new shell, so it looks like ax X but is not?

Added (1). sorry for some typos. Anyways, I ask because I'm using the app offer up to buy a iphone x, and i just want to know if i should be wary and when i inspect the phone if there's a way to check if its been tampered with so it has older hardware.

Is the iPhone charger waterproof?

I spilled a bit of juice on the charger's thunderbolt tip, I inspected it and it didn't seem like it could let anything in but to be safe I drowned it in rice. I couldn't find much online so I hoped anyone would know more, would it fry my battery if I tried to use the charger? Thanks.
P.S. The charger is plugged in the original adapter, not a wall socket.

Can Apple let me replace my broken iPhone under the 2 year contract with AT&T? - 1

Hi, my autistic brother threw my iphone 8 plus to the ground hard and its completely broken, we tried to have it fixed at a phone repair shop but it still didn't work so, they told us to take it up with Apple, I got the iphone in December 2017 on a 2 year contract with Apple and AT&T, will Apple let us get a new iPhone early from the contract?

Will I need to show the doctor my acne or can I cover it up with makeup?

I know this is a stupid question but I have the doctors soon for my acne and it's something I'm so embarrassed about. It causes me so much anxiety. I have to go in the morning to see him and have college right after, can I take pictures on my iPhone as it will show the date it's been taken and just show my spots on the phone or will he ask me to remove my makeup. There's no way I can re-apply it before college as I won't have time to go home and I can't go without because I'll be humiliated.

Does anyone know?

Activation Locked Iphone8+?

I recently bought a Iphone8plus from offerup later to find out it was ACTIVATION LOCKED, is there anyway to bypass this? I found a site that offers to fix it but they haven't messaged me back. Do you think ATTN would help or did i buy a useless phone?