[mtwiford]

Install the OpenSSH package via Cydia.

Next use a SSH client to log into your iPhone from a Mac/PC connected to the same local WiFi network.

On a Mac OS X machine open a Terminal.
Type ssh root@your ip address
If you receive a security note accept it by typing yes.
When prompted for the password type alpine.
Type chmod 777 /var/Keychains
Type chmod -R 777 /private/var/Managed\ Preferences/
Restart your phone *make sure that you restart your phone, your permissions will not take place until you do*


On a Windows PC get a free SSH client like Putty.
Start Putty. Leave all the settings with their defaults and in the Host Name field enter your ip address.
At the login as prompt type root.
At the password prompt type alpine.
Type chmod 777 /var/Keychains
Type chmod -R 777 /private/var/Managed\ Preferences/
Restart your phone *make sure that you restart your phone, your permissions will not take place until you do*