ive tryed serching f or this but i found nothing. Is there an app whereby when i put the iphone in sleep mode (press the button on the top) 3g turns off and...and when i unsleep it and then slide to unlock, 3g is turned on automaticly? this app would be great becuase my battery is being K.O'd and its long going into settings each time to turn 3g of! i have an iphone 4 32gb btw. Cheers!