@Techi : Some clarification here:
Orange/Telkom Kenya/France Telecom has both GSM & CDMA networks.
The 3G+ product is available on the CDMA network.
The 3G network is (was?) on trial on their GSM network in selected areas.

@Wallace: No amount of configuration will allow you to use a GSM device on a CDMA network or vice-versa. The limitation goes down to hardware and the processes involved before the device hooks up onto the target network.

Tony.