Can I trade my S3 for an Iphone5?

I just had my Samsung Galaxy S3 last November 2012 via 2 year-contract in T-Mobile. Is there way where can I trade my S3 for an Iphone5. I've always wanted an Iphone for a smartphone in the first place. The only reason that I got a S3 is that T-mobile doesn't have an Iphone last November. I'm into Apple devices.PS: T-Mobile is releasing their Iphone5 on April 12.

IPhone 4s Must Connect To iTunes?

My friends thought it would be funny to disable my phone to the point when it said "iPhone is disabled connect to iTunes." How do I access my phone again without deleting all my data?

IPhone can connect to Wi-Fi but bad internet connection?

My phone connects to my Wi-Fi network no problem but the internet connection is inconsistent at best.running a speed test from my desktop (connected by ethernet cable) I get a nice graph that looks like a plateau of 32 Mb/s, on my phone I get one spike of 13 Mb/s but mostly a very low less than 1 MB/s base. If I do the test with phone while on 3g I get a consistent plateau of 6 Mb/s.what's going on?
Also, my network is password connected and no one else is on it.

Added (1). Wi-Fi reception is fine.full bars. Its the internet connectivity. IPhone 4, Tmobile, ASUS RT-N66U router

Is $10 for an iPhone 5 case too much?

Okay so I always buy the cheap phone cases from Amazon and quite honestly, I have never spent over $5 on a phone case. I just got the iPhone 5 however and my sister bought me a case for $20 at the mall but it is worn out now and I need a new one. There's an iPhone 5 case on Amazon that I really like but it is $10.Is that way too much for a phone case?

Added (1). Well I'm not talking about an Otterbox. Those are sh*t cases that just make the phone look ugly. Ain't nobody got time for that.

I need, help on my twitter account

Hi, everyone i"m Mario, i have issue on my twitter account, few days ago my twitter account isn't working property on my iphone 5. I just down loaded news ios 6.1.3, so now every time i try to follow someone it says unauthorized. Also it dosen't allow me to see my followers who i'm following. Can anyone please help me?

How does AppleCare replacements work?

I have an iPhone 5 that just cracked and I want to know a) if you have to bring it back to the exact apple store you bought it at? B) do they give you the new phone on the spot and handle charges and what not?

Which one should I get? IPod5th gen or iPhone 4?

My birthday is coming up and my friend was telling me i should get the ipod beacuse i won't have to pay for it monthly or anything and its cheaper than the iphone 4 so i don't know? I want the ipod cuz its bigger and slimmer but i want the iphone just to basically make phone calls anytime i need to but i rarley make phone calls even with my old phone i just text. And what i don't like with the ipod is that i can only text and have internet where there's Wi-Fi >,< BUT my friend knows how to gail break the ipod and let it have Wi-Fi anywhere but its complicated