How to block a number on my iPhone

I don't know how but someone got my number and i don't know them and they won't stop texting me! Is there a way I can block the number?

Can I use used iphone with my current sim card?

I got a iphone 3g from someone i know and I'm using att phone that is not a smartphone.
Can I use sim card from current phone I'm using and put it in the iphone I received and still use it with same monthly payment? Without paying anymore than I'm paying now?

Why won't my itunes sync with my media player?

So I have a iphone 4 and when I 1st downloaded Itunes all my songs from my Media player synced with it and it let me put all my music on my phone but I recently added some new songs (63) to my Media player but they did not show up in my Itunes so now I have no idea how to put them on my phone.

Also my Media player won't sync with my phone too.

What are some good tv shows to learn mandarin?

I'm learning mandarin, engulfing yourself in the language is a great way to learn, but I know no one who speaks mandarin, I'm not around those who do, and am often forced to stay cooped up in my office at a computer quite a bit. Are there any tv shows (children, cartoons, whatever) that would not be so over complicated to listen to as I do work just to immerse myself? I know I'm asking a lot, but I'd love to know your thoughts and any other suggestions. I'm learning using Rosetta Stone, a couple of apps on my iPhone, and other stuff.

USB not recognized help? For windows 7 ultimate?

Whenever i plug my usb cable into the computer and then my 3 generartion iphone it just says that it's not recognized and that it has malfuctioned and the only way to fix it is to replace it? Any help would be greatly apreciated it still charges but doesn't show in itunes.

Added (1). And every 10-20 seconds it makes that noise when you plug in your phone and sometimes when you disconnect

What to do with a broken iphone?

I have both an iphone 4 and 4s both broken and i was wondering what i could do with them like creative wise like do something cool with them any ideas?

Why does the flash on my white Iphone dosnt work to good?

Me and my boyfriend both have an Iphone but he has the black and I have the white iPhone. But the the flash on his phone works perfctly in the dark. The pictures come out good. But the pictures on my white iphone with the flash come out dark, blurry and not good at all. Is there settings I need to change? Why do the pictures come out so much different if its the same phone?

Iphone won't turn on Black screen?

I was in the middle of my game and it just faded to black. I tried restarting it, DFU mode, hold home + power for 10 seconds.tried plugging into itunes, but computer doesn't recognize it. Please note my IPhone is jailbroken. It doesn't get stuck in the apple logo like most peoples. It's just plain black screen.