I used to get the UMA signal when hooked up to my WIFI at home on my Bold 9700, I havent managed to get that since moving to my 9900... any ideas? I'm using 7.0 OS and am on Orange UK.
The 9900 doesn't have a UMA chip like the 9700 did. Instead it uses Wifi Calling via an app integrated into the OS. The main difference between the 2 is that Wifi Calling will not seamlessly hand-off to the network when out of wifi range like UMA does, and your call will be dropped.