Why won't Game Center work on my iPhone 3?

Everytime I try to play a game, Game Center pops up and when I try to make a new apple id or try to press anything then it won't let me. It totally freezes. I tried to click on the game center app, but it kept loading. What can I do about this?

Added (1). Yes. I did jailbreak it. Plus, GameCenter IS supported on the iPhone 3. I would know since it worked for my dad.

Is it possible to undo a restore iphone?

When I plugged my iphone into my laptop and itunes, I selected to restore it with my old ipod touch (bad idea).

As a result, I lost my pictures and past messages. Is there a way to undo this restore with ipod touch thing that I did?

Strange problem on my iPhone?

I can hear my ringtone going off, but when I try to listen to Pandora or watch a video on YouTube, I can't hear anything but only when i plug in my headphones it works. I have check the sound option the little button on top of volume on the left. Is there any think else i have missed.

Added (1). That is I phone 4 and the software is updated as well.

Can I switch my sim card from Blackberry to Iphone?

Ok so I've had a blackberry for the past 2 years and the track pad on it recently stopped working. I'm on a 3 year plan with bell. My girlfriend got an Iphone 5 last weekend and she just gave me her Iphone 4. She told me I can simply take my blackberry sim card and put it into the IPhone. Is this compatible? Getting the phone from her on tuesday so please let me know if it's possible.

My iPhone 4S won't let upload pictures on Facebook?

Okay. So I've had my phone for 4 months and I've never had any problem uploading pictures until out of the blew. I can see them but other people can't unless I tag them in it? I have the same problem with my statuses I've tried several things. Any ideas?

How to clear iPhone recent contact cache?

On an iPhone when you go into the messages app and you begin typing someone's name. Is there a way of clearing this as i have noticed contacts that i do not have anymore still show up.
I'm assuming you can as this is a type of cache which stores them and surely it can be emptied.

Could someone tell me how to do this please if you know.

Content lost on my iPhone 4?

Have iPhone 4 basic model. Got low on memory so plugged into computer to download up to date apps etc. I did some iTunes sync process and then hit restore. Now everything is gone except my contacts. I tried to get it back while plugged into desktop but there isn't an option to get my photos, texts etc.