I am experiencing a few issues with my iPhone 3G. I am using the iOS 4 operating system. The 1st issue is my iPhone restarted/rebooted by itself when I was installing a app. The second issue is that it took a long time to restart (it was stuck at the apple logo) These are the 2 issues that I know of right now. Also it did take a while for itunes to detect my phone. Also I do not have a warranty, What should I do? Thanks!