Is it possible to "un-jailbreak" my iPhone?

[diamondhindend]

I was thinking about jail-breaking my phone, but I'm not sure if I'll want to keep it that way.

If I do jailbreak it, can I un-jailbreak it?

I'm using the iPhone 4

 

[MurrayA]

yes, before you do the jailbreak, back up your iphone

then when you get tired of it, restore your iphone from the back up