I have an iPhone 3g S and when i open cydia and download an app and reboot my iphone, it goes into recovery mode and i have to Restore it, I'm running it on Windows XP, but ive done it 3 times and each it shuts into recovery mode. i have no idea what to do with it. please help.
If you recently bought your iPhone 3GS, chances are it has the new boot loader.
Apple changed up the process of how your iPhone boots up, with the most recent batches of the 3GS, which forces you to have a "tethered jailbreak". Whenever it turns off, you need to plug it into the computer to boot it up.