Hello all, I'm new to this so please bare with me. I got 3 MTS2000 flashport radio's from my friend. 2 of which has a screen on the front (That's not readable) and 1 that has a screen on the top. I believe these radio's are 800Mhz. The radio with the screen on top I can PTT fine and pick it up on my scanner. The other two when I PTT they make a bonking noise. I'm trying to figure out if there is a way to put the other two into talk around mode bypassing the 800Mhz system. Any help would be appreciate. Please let me know if I don't make sense.