[pyroslev]

If you want to still use PTT method, Voxer is a good app. Uses Data on your cellphone. I use it when I wanna have a short conversation beyond texting but without calling. There is also bluetooth integration as well.

Warnings:

Careful about when you use it. If you are using it for stand to field comms in alliance selection, possibly legal. During match play at a off-season event, one team communicating from stands to field non-electronically was given a yellow card. So be smart on that front. Read the manual and ask the staff at your event before you use it. When it comes to bluetooth earsets, I encourage teams to take them out if they're on the field.

The app can eat battery power. Between that and my FRC Spyder App, my battery hated me by noon. Also the default ringtone is extremely quiet. That makes it hard to hear.