There's absolutely still some in front line service around my area. My agency still has a handful of MTS2000's in support roles, I'm confident they'd be front line but they use a different battery from the XTS and that would confuse guys too much.

One of the agencies near us still has MANY in use ...

You can decode the flashcode at http://www.radioreference.com/apps/flash/.

Yours comes back as only:
H35/G48 Conventional Operation

I have a MTS2000 UHF "S" split with an issue. The radio worked flawlessly for several months, and now the radio is constantly transmitting. I've tried it with and without a speaker mic attached and still the same thing. The radio just constantly transmits, and you can hear audio like it is an open ...