It is not required, but it is recommended. You should back up your iPod before a jailbreak nevertheless...
Yes, you can undo the jailbreak. You have to restore your
To get rid of the iPod jailbreak, restore your iPod through iTunes.
no, to get a newer jailbreak you have to restore the ipod touch and then update the ipod touch and then download the jailbreak. that is a huge con for jailbreaking.
No, I jailbroke my iPod touch with blackra1n, and I didnt have to restore it.
Yes it does it will restore all your previous software and just add cydia!
restore and re jailbreak
Hey search 'spirit jb' (jb = jailbreak) easiest (and working) 3.0 ipod touch jailbreak and you can turn ur ipod off and not have to restore everytime you turn it back on.
No. As long as you have it backed up to iTunes or iCloud, you can restore it to those settings before the jailbreak
Plug it into your computer. Open iTunes. Open the iPod tab. Sync it. Click restore. WARNING: THIS WILL ERASE ALL DATA FROM THE IPOD. Use the backup created when you synced earlier to restore the data. This will not put the jailbreak back on.
Go to iTunes and click restore under. It will restore and set everything to how the iPod was original bought.
No it wouldn't be broken. If there's something wrong with the Ipod, and it does brake, just restore it.
If you have 3.1.3 firmware then yes, you will have to downgrade to 3.1.2. This does NOT work for the 3G.