Can I Get A iphone 4 Or 5 Activated?

I have a HTC Titan (windows phone) and I want to get a iPhone 4 or 5.Im with at&t but I want to buy the phone off of someone and have it activated with at&t, is that possible? Reason being, I've only had my phone for a year and would have to pay alot of money to break the 2 year contract then pay even more to get the phone through at&t after that, I thought I would be able to take my sim card and transfer it to a iPhone but there not compatible and would have to cut it to fit but I want everything legit. Can someone help?

How to learn to write ios applications?

More or less I have wanted to try writing apps for iPhone like most people apparently. I've had some experience with programming before but none with obj-c which seems to be the most commonly used?
Anyone know any sites/online courses that start from a very basic level?
Cheers

What cable can connect a usb to iPhone 5?

I want to buy a cable for my iPhone 5 that would allow me to take to the photos and videos from my USB and import them directly into my new iPhone 5 but can't seem to find the right cable for it?

If you could provide me with a name and a link to where i could get one you could easily get 10 points! Or just a name would be fine.

Is it possible for my iphone 4s from sprint to be unlocked for t-mobile?

So I bought an amazing Iphone 4s off craigslist, which was used by sprint or cricket and the seller told me to go to t-mobile and they'll unlock it for me. Is that possible because I saw programs saying they unlock any carrier's iphones for only 20 bucks, plus the iphone 4s iOS of 6 has a sim slot

I can't hear as well out of my left ear?

Well actually, I don't know if 'hear' is the right word. I feel like its quieter but when I plug my ear and listen through the other, its the same for both my right and left. When I'm singing, it's like the vibration isn't there near my left ear. Could this be from wearing headphones too much? I don't usually put volume very high- its usually at 50% on my iPhone. My mom's tried cleaning my ear out with hydrogen peroxide and I think that helped for a little bit but it's back now and it's really annoying.

Iphone 4 warranty and technical issues?

I dropped my iphone 4 and both front and back are completley shattered. However, my phone is out of warranty. The music on my phone doesn't play out loud, however ringtones and text message tones will work. My front camera also is broken and will not load, freezing and going on to a black screen when I try to do so. Will apple fix my phone screen for free as the camera is broken? Or should i get the cracks fixed and then take it to an apple store and would they fix the technical faults (camera and sound) for free? (Front camera is not cracked) thank you