If you are not running the latest firmware, o would do it. The last upgrade seemed to make my "t" decode digital a little smoother.
Other than that, the radio will listen to phase 1 P25 out of the box. It will not decode phase 2.
Depends on the systems you listen to, and where you are in relation to towers how well it will handle simulcast. My experience is not good.
Mark
SDS100&200/536/436/WS1095/996p2/996xt/325p2/396xt/psr800/396t/HP-1/HP-2 & others