You can if you take an iCloud backup instead of a local backup. You can log in to iCloud and I believe in the iPhone setup it will automatically restore a backup.
Well if you mean restore by reset then yes. Just plug it into your computer and choose to restore to factory settings.
Jailbroken and are not located in the US.
You have to hook your iPhone up to the computer you last synchronized it with otherwise it won't restore.
Sadly one you update to the latest iOS version, there is not way to downgrade or restore to an earlier version without using intricate hacks.
If you want to restore your iPhone plug it into the computer, open iTunes and click the restore button. You will lose everything if you don't chose the correct backup.
Simple, plug into iTunes, restore to factory settings.
No!
Fix? What do you mean? If you want to restore your deleted or lost iPhone without iTunes backup, you may need to get a third party tool to help you recover your iPhone data. You can try Tenorshare iPhone Data Recovery which will directly recover data from iPhone.
It depends on if you have any problem with the phone, like battery problem, not working to charge etc. Then you should restore the iphone. If you don't have any issues like these then it's enough to restore your iPhone at least once a year.
Easy! You just connect to your computer, make a backup, restore to factory settings, restore from backup, password gone!
No, I jailbroke my iPod touch with blackra1n, and I didnt have to restore it.
Plug it in to iTunes, press Restore. It should restore your iPhone to its factory settings, thus killing the jailbreak.