Kept sim in phone for a start.
Shift - Restore to Beta 3,
Go through the install until you hit the activation wall,
Turn off Phone, Load up Redsn0w, point redsn0w at your "Beta 1" firmware, select install cydia, follow the steps then let it do its thing.
When your phone turns on unlock and go through until you hit the activation wall again,
Turn off Phone, Load up Redsn0w, point redsn0w at your "Beta 1" firmware, select boot tethered, follow the steps through and let it do its thing again.
When your phone turns on again unlock and follow through until you hit the activation wall once again. NOW LOCK PHONE.
Load up ifunbox, navigate to raw file system, system, library, core services. Drag the PLIST "System Version" to your desktop. Open with notepad and delete the following code "<key>releasetype</key> <string>beta</string>" Save file then drag back into iFunBox to overwrite.
Turn Off Phone. Turn On Phone (No need to reboot using redsn0w this one time).