Dropped Iphone 5s in the toilet?

I dropped my Iphone in the toilet for at the most 3 seconds and when I pulled it out the display lit up for about 10 seconds and now it has been OFF ever since. I have the phone in a bag of rice and I'm hoping eventually the phone will turn back on. As of right now the phone is very hot and there's a red dot that is lit to the left of the speaker at the top of the phone? Any suggestions what this means?

Got the new iPhone 7 Plus and my data is draining?

I have Verizon. When I had the iPhone 6s I never had issues with my data draining. I use Wi-Fi most of the time. I don't let apps automatically update. I have Wi-Fi assist shut off. My Facebook app doesn't auto play videos without Wi-Fi on. Is there anything else I can do to stop my data from draining so badly?

Can I exchange my iPhone for a different colour?

I have two iPhone 7 Pluses (both Rose Gold) but one I purchased and one was given to me in a giveaway. I wanted to gift it to my brother but I don't think he would like Rose Gold. It's perfectly sealed and untouched but it was not purchased directly from Apple. I'm wondering if I could request to exchange it for a matte black one at an Apple store. Would I need paperwork? And if so, what do I need? I just want to change colours. SOrry if the answer is obvious but I just want to be certain.

Clash of Clans and stupid Gamecenter?

So before, my dad had an iphone 5s, and now he has an iphone 7. I have the 5s now and I wanted to play clash of clans but its the same as my dads. How do i delete it and start over while the clash of clans on the iphone 7 stays the same?