Having moved to the 9900 and suffered the lack of UMA, then the introduction of the pseudoUMA (wifi calling) which is just unusable, I recently had the opportunity of using proper UMA again on a blackberry bold 9790.... It reminded me how good proper hardware UMA is and just reaffirmed how much I miss it on my 9900.
SO...the burning question in my mind is WILL BB10 devices have UMA hardware or will RiM make the same mistake again and not include it, or will they just do software UMA?
My hope is that they realised having failed to put it in the 9900 and then subsequently putting it in the 9790 that its one of the things that makes a blackberry great.
PLEASE RIM dont forget what is good about a blackberry and end up producing a flashy look and feel and ignoring function!