According to this thread, it looks like there is activity on the new P25 system. OKlahoma City APCO P25 PI & PII TDMA Alternating I would suspect that the ProVoice upgrade may be a waste of money at this time. Everyone will be migrating to the new P25 system. If you download and install Butel ARC-XT for the free trial period, I have a file that you can use to program your scanner. ARC-XT supports ProVoice, DMR, and NXDN. You can use FreeSCAN, a free program, which will be fine for the P25 system, but does not support DMR or NXDN. Downloads - Sixspot Software You can also use ProScan, another paid program. Both ARC-XT and ProScan have free trial periods so you can try them and decide what is best for you.