Guide to buying an iPhone 4 on Craigslist?

I found an iPhone 4 on Craigslist and it's very close to me and AT&T which is very hard to find, usually they run 200+. This person isn't fake just by my general obvs. And talking to them. They want 160. I want to go look at it because it won't be a big hassle on my part but, just wondering what should I look out for? I've heard a lot of talk about "ESN" and don't know what that is or how to look at it. Please give me any advice you can, thanks!

IPhone 5 shuts down every 5 minutes?

Every five to ten minutes my iphone 5 will get a weird transparent screen slide down from the top of the phone. Usually it is some vertical lines. And then the phone shuts down and turns itself back on. It also uses almost 5% of the battery every time. What is going on and how can I fix it

I need an app that will track an iphone throughout the day?

I have a client that wants to track an employee of theirs via an iphone app/software. It's not enough if they know where he is at any one time, they want to know the entire history of where he's been throughout the day, and the speed at which he was traveling (if possible).It sucks for this poor guy, but it's what the client wants, so I need to suggest something.

What is up with Virgin Mobile

I live in Florida and just got a new iPhone with Virgin Mobile last weekend for my graduation gift, and it worked for one day thehn nothing! I see the bars, it says Virgin 3G but I can't use the internet unless I have Wi-Fi and I can send/receive texts and phone calls and thats all.
I DO have the unlimited everything plan btw.
like are the towers down or wtf?
also, I'm leaving to Texas in a few days so will my phone continue to be like this over therE? Please and thanks for reading/answering.x

Iphone 5 stuck in headphone mode?

It was working and i set it down. Later on i tried to listen to a snapchat and when i turned the volume up it said headphones in? And sound wouldnt work. They worked when i plugged the headphones in! I've tried resetting it and there's no water damage?

Why can't i put songs on my iphone 5?

I plugged it in, chose the album, clicked sync but it only say "preparing to sync" and then "waiting for changes to be applied":( i feel so frustrated.

Where is the button for smiley faces?

I just got an IPod 4th generation and on things like Instagram and Facebook I'd like to but smiley faces but I can't figure it out! Is there even smiley faces like there are on iPhones?

How to Recover My Notes IPhone 4S

I was writing on my Notes on my IPhone and my WHOLE story got deleted somehow! As I was writing it, it disappeared! So I tried re-writing it from what I remembered and it got deleted again! This has been happening alot lately and I'm NOT hitting the delete button or anything. It's just gone! Most of the time it happens when I'm writing it. I Really don't want to write it for the fifth time!

Is there anyway to recover the notes that mysteriously got deleted!

If you use FB messenger, do your messages show up in your inbox on FB?

Say someone was messaging you from the FB messenger app from their iPhone and you didn't have the app on your phone - the messages will show up as a message in the inbox. What if you were to download the app onto your galaxy note and then message this person back? Would the messages you send from the app be shown in your messages on FB?