Yes – AFAIK the virgin "lobster phone" (made by HTC) was the only one on the market.
It was actually built for the virgin mobile tv service (now defunct – who remembers the pamela andersen adverts..?) but as a happy by-product it supported DAB. I remember the last units being punted out on one of the freeview shopping channels last year (just flicking through channels by coincidence, honest..)
There's an ongoing debate about the viability of DAB in this (and many other) countries. The recent "digitial britain" report squashed the idea of a forced "switch-off" for analogue radio in 2015, so FM will live on.
In the meantime, we're stuck with the old DAB audio codec (mpeg-2) which produces poor quality sound for a given "channel" than the newer "DAB+" (or T-DMB) systems that other countries (who came later to DAB than we did) have deployed.
THe only reason why we haven't adopted DAB+ is that there are too many legacy DAB radios out there to "drop" (but, ironically, not enough DAB radios out there to drop FM and share out the freed-up radio spectrum to increase the channel size for the stations, which would go some way to overcoming the limitatations of the mpeg2 audio codec). You could have DAB and DAB+ co-existing, with only newer dual-mode receivers (of which there are already several) able to pick up the DAB+, but that wouldn't be a good use of radio spectrum. However, it's the only real solution that gets us out of this mess.
So, why can't you have it on your mobile? Blame the government/ofcom etc for not having the foresight/guts to do something other than watch DAB fade to grey. Next stop will be ubiquitous "internet radio" delivered over IP to your smartphone over 3G/LTE..
Disclaimer – all of this is based on a "little knowledge" from watching mobile digital radio/tv market from a technical perspective..