It's taking too long for my iphone to update?

It's been around 2 hours know, my iphone 3 is trying to update iOS 6 but it turned off and every few seconds it keeps popping up the apple logo. It has been doing that for 2 hours now. My phone is also heating up, how do i cancel the update?

Make sure youre connected to wifi. Try putting your phone on charge. It takes a lot of power. If it doesn't work take it to your nearest apple or Telstra store

Get a 5

Dont try to charge it.put in a open place and when the battery dies try to charge it until it reachs 100%