I got it from HERE
Before that i could not do anything over 2/3g.
Now it works just fine.
One thing i remember, the device will boot in French, but you can change to English after in the control panel.
Before doing anything make a Device backup!
my radio hardware version is 0.0.0.800
radio software version 2422.214.171.124
Currently using the above radio with a custom rom v 126.96.36.199.4 and no problems with data.