IPhone 4 iMessaging problems. AT&T?

I have an iPhone 4, 16gb (that doesn't mean anything but I guess I'll put it there anyway)

It's on AT&T and I swapped the SIM card from my old Android phone.

About one tenth of my texts fail to send- ONLY iMessages! I have a texting plan but I live in a wealthy place so everyone has iPhones, so I basically use iMessage the entire time.

I click send and it zooms up to the end of the loading bar and stops. Usually it just takes a minute to send but sometimes fails to send.

I always have 3-5bars on AT&T of 3G.

What's the problem?

My iphone's lock/power button no longer works?

I have the iphone 4 and about two nights ago the power/lock button got really hard to press. I have an otter box case so I just assumed the bulky cover was making it hard to press and ignored it well I woke up this morning and it won't work at all. It's almost like it's jammed and I took my cover off so I know now it's not that. I just got this thing in December so there's no way I can replace it already. Is there anything I can do to fix it myself?

Can't connect to the internet?

At school I can connect to the school's Wi-Fi but I can't use it. All my other friends with Android phones and iPhones can connect and use it. Can someone give me tips to try?

I have the LG Optimus L3 and can use the default browser, Opera Mini and Dolphin Browser.

What does shake do on IOS Devices?

On the little assistive touch dot (on my IPhone 4) if you go to devices>more then there's a button that says shake, I have clicked on this multiple tunes but it doesn't seem to do anything. What does it actually do?

How to get around the passcode of an iPhone?

I got an iphone 4 free from my job.someone left it there and after a month no one came to pick it up. I want to start using it but there's a passcode. How do i get around it?

No Service/Searching iPhone 3GS?

Hi, my iPhone is currently running on the 6.0.1 iOS on the (06.15.00) Basband. I have recently jailbroken my phone in order to use my Vodafone SIM on it (It's currently locked to o2) and I have followed all the instructions to unlock my device. The jailbreak and hacitvation process has worked flawlessly however after download and installing ultrasn0w fixer 6.0.1 then installing ultrasn0w via Cydia, I insert my SIM and all I get is a 'Searching' then a 'No Service' in the top left. I'm running out of ideas any help would be appreciated.

How long does it take to become an iPhone/IOS developer?

I know a little bit C and some Actionscript3. How long will you estimate that it will take me to become an iPhone developer and be able to post some apps on the Apple store. I plan to learn the IOS platform about 4h/ day in average.
PS: Please let me know why this simple program does not show the output when I'm using scanf with %1 or %d. I have no errors from the compiler. Thanks for your time guys.

The program runs without any errors or warning, however when I type a number
it does not show the output. (thank you for your help) Here's my code:

# import < foundation/foundation.h>

@ interface Person: NSObject {

int age;

}

-(void) print;

@end

@implementation Person

-(void) print {

NSLog (@" Enter a number please ");
scanf ("i", &age);
NSLog (" your number is: ", age);

}
@end

int main ( int argc, char * argcv []) {
NSAutoreleasepool *pool = [ [ NSAutoreleasepool alloc] initi];

Person *Fred;
Fred= [Person alloc];

[Fred print];
[Fred release];

[pool drain];

return 0;

Wheres my music on my iphone?

I got a brand new iphone yesterday and they switched over my music from my old phone but when i pull up the music button it says no content… Where did my music go and how do i access it?