My iPhone 3gs 4.3.4 is stuck in a rebooting cycle. It will not load into the home screen or even turn off. I have tried the holding 10 seconds button mashes but nothing is working. Can I restore it using a program or even somehow get it into dfu mode or something? I have a Macbook 10.6.7. I really can't figure it out. If anyone here knows how to fix it, it would be lovely to try out some things! Thanksssss 