Removing all thraces of jailbreak

[Thomasso]

I'm planning to bring my iPhone 3GS in because a sunk mute-button.
I've jailbroken my iPhone and I have to remove all thraces of a jailbreak.
Is a simple restore through iTunes and set up as new enough or do I have to restore it in DFU-mode?

 

[JamesHP]

Yep, DFU restore will do the trick. It worked fine for me when I got my iPhone 4 replaced a couple of weeks ago.

 

[Thomasso]

It has to be using DFU-mode?

 

[cvd]

A dfu-restore is essentially an iTunes restore. Boot it to DFU-mode and plug it into iTunes and restore.

 

[andy9l]

And don't restore any backups to the phone after the initial restore process - set it up as a 'new phone' when iTunes asks.

 

[Thomasso]

A dfu-restore is essentially an iTunes restore. Boot it to DFU-mode and plug it into iTunes and restore.

My phone is still working fine, so I can also just plug in it and hit restore in Itunes without the hassle of getting it in DFU?
And then set up as new after the restore.

I'm restoring it now in DFU-mode.

 

[kdesign7]

My phone is still working fine, so I can also just plug in it and hit restore in Itunes without the hassle of getting it in DFU?
And then set up as new after the restore.

I'm restoring it now in DFU-mode.

Yes, once you put the iDevice into DFU mode, you will then see an iTunes icon appear on the screen, directing you to plug it into the computer. Once this is done, you will then have a Popup display on the computer saying iTunes has detected an iDevice in DFU mode, you are then set!