| | Re: 7.1 OS for BB 9000
The 9700 had true UMA (in that a WiFi call could automatically transfer to a 3G network) but the 9700 was only 3G.
The 9900 has a form of UMA which is really WiFi calling. Once you left the range of the Wireless Access Point the call drops - it would not transfer to the 4G network. The 9900 is a 4G device.