How to unlock my jailbroken iPhone 4S?

It isn't on 6.0.1, it's still on 5.1.1, and the baseband is 2.0.12. I have no idea how to unlock it and need to for use with T-Mobile. Any help would be greatly appreciated.

Does the AUDIO TECHNICA ATH M50 headphone plug fit into a Speck iPhone 4 case?

I'm probably going to get the ath m50's, but their metal plug looks huge! Anyone out there with ath m50's and the speck candyshell for iPhone 4 that can give me an answer?

Added (1). I'm not talking about the 1/8 plug… Obviously it fits into the iPhone. I'm talking about the fat metal part directly above where you plug it in.

What to get a teenage girl for christmas?

She's 16 years old, she has a laptop, iphone 5, tablet, mp3 player, digital camera, and she doesn't want a tv. We have an xbox, wii and playstation as a family. I have no idea what to get her this year! She plays soccer and volley ball and really likes sports, she also into music and stuff. Her favourite colours are green & blue, i don't know if that helps any. I'm looking for like the BIG present it can be anywhere from $150 - $400 range. Need lots of ideas, cause i've asked her and she can't even think of anything! And btw she has tons of clothes! I need the "big" present. Other things i can think of.

How to reduce the lag on my apps?

I have an iPhone 4 and I got an app that takes up some space on my cell but I still have enough space. Why does it lag so much? What can I do so it can run smoothly

Is there any phone/camera like the iPhone's camera?

I was just wondering if there's any phone or camera out there beside the iPhone that you can take a picture of yourself but you can veiw it while your taking the picture? Does anyone know what I'm talking about?