What information does the sim card hold?

After my iPhone fell in the water and stopped working, I have decided to get a new phone. It is before my upgrade is due, so I will have to pay a penalty for having it early. However my dad suggested handing my phone into them to maybe reduce the price.
Anyway, if I take my sim card out, what will remain on my phone itself. Because I do not want the people seeing like my pictures, or any other personal details.

So what will remain on my phone, and what will go?

How to enter an international number?

On my iphone, how would I type into a new message an american number, do i have to put in the brackets? And how many numbers long is an american number. I'm in the uk.

I really need a website to download minecraft pocket addition?

I have tried PandaApps
Like uTorrent
iPhonecake
And I have no friends who have iphone that have downloaded minecraft full. I haven't got a credit card neither have I jailbroken my phone. I hope you can help. The answer I think is the most worth wile when I try them all will get best answer. The first one to work will automatically get the best answer. Also I want nothing to do with Dropbox.

Iphone troubleshooting

My iphone 3gs is turned on but the screen is black apart from my onscreen home button. (my home button dosent work but now the lock button isn't responding either, i can't do anything but the slider to turn my phone off keeps randomly appearing; so i slide it but it stays turned on just black. So i can't turn it off either or reset without neither buttons. It can't be to do with the screen because, when voice control comes on randomly, i can see the top strip with the time, battery life, signal etc.won't turn off, basically not really turned on since i can't use it.what's up with it? And does anyone know how to fix it? BTW this happened in class today, when someone rung me, so i quickly held in the lock button to turn off and when i got out of class i noticed the screen was black but urgh. I know the phones old and everything. Also its jailbroken but i'm sure thats nothing because it has been since the day i got it. Sorry its long please help.

Is it ok if i turn my IPhone 4S on and off all the time?

Hi, i go on my IPhone 4S most of the time and sometimes i go on it for about 10-30 min's and then switch it off. I was wondering if this is ok as it may harm the actual batterry. I do this mostly in the morning before school to check for messages, notifications etc. I only go on it in the Morning for 'about 10-15 min's. If you could tell me if this damages the battery i would appreciate it and tell me how long i should keep it on for before i switch it off also i do turn it on and off quite consistently!

How to boot iPhone into safe mode?

I installed a Woody Woodpecker ringtone to my phone using Cydia, I pressed reboot phone and now it's stuck in a boot loop, all I get is the apple logo, in an attempt following a YouTube video to put the device into safe mode this made no difference to the device, all it does is dim the brightness on screen, a symptom that I can't find anywhere on the internet.
Is there a program like RecBoot for windows that can do this for me, it's only 1 little silly tweak in my way and don't see why I should wipe 64GB worth of stuff just because Woody Woodpecker is sitting on the system. - Thanks

Added (1). Update; while the brightness is dimmed on the apple logo screen iTunes reads it as if it were in normal mode

Is there any way I can sell my mobile app UI and graphics?

Is there any way I can sell my iPhone app UI? I worked on an iPhone app project early this year but due to personal reason, I have no choice but to discontinue my project. The UI was designed by a very professional graphics designer. I haven't worked on the source code though, which is a good thing because I would have to spend a lot of money on the programming phase.

Is there any website where I can sell my iPhone app UI without the source code?