IPhone – Replaced Screen “Searching…” – cannot find network provider

The only visible change that jailbreaking does is the installation of the cydia app on your homescreen. what i would suggest is to go into cydia and get an app called Poof to hide the cydia icon. You can follow the guide here http://www.iphoneappsandhacks.com/how-to-hide-icons-on-iphone-or-ipod-touch.html, or you can hide it in a folder with a bunch of other apps.

When the phone initially said disabled, you could have just left it untouched for a few hours and it will give you the option to try the passcode again, normally has a count down timer to when you can retry the passcode.

Anyhow, you can restore the phone using the DFU mode, hold down the home and the power button until screen goes off then immediately release the power button whilst still holding down the home button, make sure the phone is connected to the computer and have iTunes open when doing this.

The screen will remain black, but you should see the iPhone appear in iTunes where you can restore it.