Please do a review of the various carriers push-to-talk services. I am in the towing business where push-to-talk is vital keeping dispatch in quick contact with drivers. We must use rugged phones, that can be dropped ten times and still work, not pansy breakable smart phones. Nextel analog push to talk always worked. When Sprint shuttered Nextel and went digital then Sprint push-to-talk never worked. So I switched my company to AT&T when our two year contract with Sprint was up, thinking AT&T push to talk couldn't be any worse than Sprint's. I was wrong. AT&T push-to-talk is horrendous and not worth messing with anymore, we've given up and just use standard cellular service to relay voice messages. My two years with AT&T is up this December and would like a push-to-talk review before then. Please help!