#1
the one that has the alert. I remember they used to be REALY popular before but aren't as popular nowa days.
#2
the walkie talkie things? I hate those. I think they still make them, they're Nextel now. They just lost popularity because the coverage blows.
#3
Hmmm. Sprint bought them. Turned off 3G on most of the Nextel towers. The "push to talk" intefered with municipal radio communications in lots of cities and Nextel was sued repeatedly. Then it turned into Boost Mobile. (Corrections welcome)