IPhone 3G to iPhone 4, upgrade?

I have an iPhone 3GS right now, I got an iPhone 4 from my boyfriend, if I went to AT&T to get a SIM card for the iPhone 4, would that count as an upgrade? I'm trying to get out of my upgrade.

Which Is Better? IPhone 4S or iPhone 5?

I've heard that iPhone 5 has many problems is that true?
I have iPhone 3G and I want buy a new one but I'm a bit confused. I first wanted to buy iPhone 5 but I heard that it's not as good as rumors are saying. So I started thinking of buying iPhone 4S.
What do you think?

My iPhone 4S suddenly turns off?

During charging, my iPhone would just suddenly turn itself off then on again. It does it constantly. Usually when its on charge. When it its off charge, the battery percentage stays the same… The only way to change the battery percentage is to restart the phone. I just had a 2 new battery installed and both are still the same issue.

What's is wrong and do i need to change any componemts?

How to disable my AppleID from Iphone 4?

Hi, when I install an app for my children on my iphone 4, I won't let them use the phone for 15 minutes after I have entered my password for fear of them accidentally purchasing something on one of the "free" games.

Is there anyway I can switch off the appleid remaining active for 15 minutes, or a way to disconnect from my appleid once the app has been installed?

Internet isn't working but says I'm connected?

Not sure why but I was in the middle of a game on my laptop and it just disconnected right in front me. My modem doesn't disconnect or anything but I can't access websites on my laptop or phone since both of them use Wi-Fi. Not sure why cuz this has never happened before, usually when I disconnect it's because my modem needs to be restarted but since it's not the problem I don't know what is. The same thing also goes for my iPhone. I'm being forced to use 3G as my only Internet source. I'm guessing it has something to do with the Wi-Fi…

How long does your iphone 5 battery last?

I got my iphone 5 like a month or so ago and my battery lasts only about 5 hours almost to the minute. Its really bad. I don't do anything crazy, or use it too frequently (just regularly throughout the day to text an d check email or facebook or whatever) so i'm just wondering how long yours lasts to see if this is normal or if i got a crappy phone:/

Why is Cydia taking so much memory?

I just installed Cydia on my iOS 6 iPhone 4 and it added 3.7gb to my iPhone. I have a 8gb (aka 6gb) iPhone 4 I checked installous and that wasn't it. Also I know none of that memory is involed with apps. I only use about 56 mb of memory on apps.