Reinstall all of them.
No
You can without but the easiest generally do use iTunes.
Yes, you can "Undo" a Jailbreak, by going into iTunes and Restoring your iPod Touch, or iPhone.
You do not Jailbreak iTunes; you jailbreak iPods and iPhones.
back up all your junk on itunes then restore and put all your junk back on. POOF jailbreak gone
They are practically the same thing, though the Droid doesn't have iTunes music or the same apps.easier to root android than jailbreak iPhone. Harder to detect root android than jailbreak iPhone.
this will only happen if you choose to update to the newest apple software. updating music and such thru itunes will not touch your jailbreak
no. you just simply plug in your iPhone to you PC and open up itunes. set your iPhone to transfer all music and it will put it on there.
yes .. as in u mean can u sync your music from your itunes library to your jailbroken iphone .. yes you can
Plug it in to iTunes, press Restore. It should restore your iPhone to its factory settings, thus killing the jailbreak.
To jailbreak an ipod touch or an iphone, i recommend using blackra1n from blackra1n.com Have no fear when Jailbreaking because it is a soft mod, and can be restored using the restore button on itunes.
Yes you can, but you will have to redo the jailbreak process. When you update your iPhone is it wiped clean and reinstalls the new OS from factory defaults. This is also why it is so important to backup your data prior and why iTunes does it automatically. Back up your iPhone before you update it. Then jailbreak it and then restore it with the previously backed up content.