How to unlock my iPhone 4S with a GoPhone SIM?

So I have an iPhone 4S that was given to me by a friend who upgraded their phone, but there's currently no SIM card. He restored it to factory default before giving it to me. I know it is locked to AT&T, but I have T-Mobile.

Is it possible for me to buy the GoPhone SIM and sign up for a $2/day plan, then contact customer service and have them take me through the unlock process so I can use it on T-Mobile?

Will the GoPhone SIM be able to "activate" my newly acquired iPhone? I don't know too much about iPhones and "jailbreaking" seems too complicated… Thank you for any advise.

I'm missing tons of music off of my iTunes library

I connected my iphone to my laptop, it synced the phone as usual, and then i noticed that when i went to listen to music on my phone that TONS of songs were missing! I did not delete any of them, i simply plugged my phone into the laptop, and now they're gone.someone help!

Is 8gb enough storage for an iPhone?

My current phone is a piece of ***. I want to get an iPhone but i don't want to spend like $400 for it. I only have about 140 songs on my iPod 8gb. About 2 pages of apps. Mostly just social and shopping. I plan on only having like 100-200 pictures. Is that enough or should I get 16gb? OH and should I get an Otterbox Commuter case or Speck case?

Added (1). Thank you Ben!

Downloading ios 4.3 and viber?

Ok, so my dad wants to install viber to his iphone 4.
but it says that he needs that ios 4, 3 thing on order to do so
so it usually takes us about 40 mins to download that thing
so my question is help me
i have a samsung galaxy ace plus and i had no problem installing it i just added google account on my phone and got it and it works fine
i'm not apple things fan but i really want to make this work haha so help me.

I'm 17 what should i ask for for Christmas?

I have an iPhone, iPod, Kindle Fire, a puppy, North Faces, I don't know what else to ask for but people keep asking me. All i keep saying is I don't know. I already asked for cds and dvds and that's it.

What size screwdriver to i need?

So i opened up my iphone 4s using a pentalobe screwdriver, and now i'm trying to unscrew the battery connector. According to my step by step guide, the screw holding the battery connector in place is a 2.5 mm philips screw. I've tried maybe 5 different screw drivers and none of them seen to be doing anything. What size screwdriver do i need for this 2.5 mm philips screw

Please Help ME i have to be done with this before the end of the day!

Dropped my iphone in the toilet? - 2

I have an 8gb Iphone 4 that actually fell into the toilet. I pulled it out the second it fell in, it was still on.
Now the screens blank. It's not vibrating, but the light in the back is on. I tried turning it off, but as I said, the screen is blank.
I have a feeling I'm going to have to just suck it up and buy a new one, but I'm really hoping it could be saved.
Please tell my there's some way I can save it

Added (1). It's already in a pack of rice, my problem is that the light in the back of the phone will not turn off, so I'm stuck believing my phone is not off.

Added (2). Now the screen is on, the apple logo appeared but the back round is almost a sand color and it's not turning off.

Can someone Please.

IPhone 4s freezing when I try to unlock?

I have a passcode on my phone. Whenever I try to unlock it, after typing in the four numbers it freezes and doesn't open, still displaying the unlocking screen, if that makes sense. It's restarts itself after this happens, but the problem keeps happening. I have ios 6.