Faulty connection in iphone 4s?

I was repairing my iphone 4s earlier because the touchscreen isn't working when I noticed a faulty connection in my phone. Basically the connection the one running from the volume buttons to the digitalizer. The problem is a bit of copper is exposed. Is this the problem which is causing the touch screen to not work?

My iPhone isn't turning on?

I was driving back from vacation (2 and a half hour drive) and I accidently left my iPhone in the trunk for the whole ride. When I got back home, it wasn't turning on so I plugged it in thinking it was dead. It still hasn't turned on and it doesn't even have the sign that indicates that its charging.

Did it overheat or something… Please Help!

Will he know if I sign into his Snapchat or Instagram?

I got my boyfriends password for his Instagram and snapchat, and I'm already fully aware I'm being sneaky as heck.

I'm curious to know that if when I sign into his snapchat and/or Instagram from MY iPhone. Will it log him off on his phone every time?

How to reset a disabled iPhone?

Well my boyfriend gave me his old iPhone and got it disabled because he couldn't remember the pass code. It's never been synced to my computer. Is there a way I can reset it? I have an iPod so I do have iTunes.

Is this risky as a seller on PayPal?

A buyer from another country is interested in buying my iPhone. Funny thing is that He paid through PayPal as gift. On top of that he paid with a different email which had a different name compared to the one we were communicating. His reason for the different email name is that his colleague is paying for him. And the reason for sending it as a gift is because he's incidentally saving my "PayPal fees"…
I feel that the payment has been made through a stolen credit card and therefore the owner can file a complaint against his bank and I'll lose the money.

I'm thinking of sending a fake box and providing him with a tracking number. Then I'll know whether he is a serious buyer or not.

What do you guys advise me? I've read a report that Lithuania has lots of fraudsters. But he could be a potential buyer?

Should I refund him and leave this? What's your say?

How do people survive when they have a broken iphone screen?

My cousin keeps breaking her phone. And I told her just to put a tempered glass screen protector on it. The she dared me to get one, break it in several places, and use it for a week. So I did. And I can't Stand it. I had to put a piece of clear packing tape on it because I was scared I'd get cut. How do people use their phone like this?