Works on any android phone....pretty slick!
Cant say i have, I dealt with Nextel for two years and after that you are kinda sick and tired of the push to talk lol.
We actually got Verizon a week before our Nextel contract was up and have been on Verizon over 2 years now.
There's another thread on this and yes I tried it. For me it's great because I can never get a hold of my wife. She doesn't hear the phone, know to look at the notification bar for indication of incoming anything (not that she eer clears it out) so this is great so I can yell, "Answer the phone, damn it!" and have her hear it anywhere in the room!