how to restore jailbroken iphone 4

[Inferno]

I want to jailbreak my iphone 4 that i just got but idk if i can restore it by the time IOS5 comes out and if i can how do i do it without bricking my Iphone 4? Please help.

 

[Alli]

To restore an iPhone from a jailbreak, just hit the Restore button in iTunes and restore as new. It's that simple.

 

[Inferno]

and nothing happens to it? it goes back to the way i bought it?