PTT is used heavily in delivery, construction, emergency service, security, and other industries. When the BB curve finally came out for PTT on Nextel many jumped for joy. This is good news for those who just cant live without PTT. There is an inherent problem in the iDen network for these phones though. Data is just too slow. Yeah-- it will be fin for email, messaging, twitter, etc- but browsing, streaming media, etc are just not possible without wifi on the iDen (NEXTEL) network. Sprint had a couple of phones for a while that were hybrid and used iDen for PTT and CDMA for calling- too bad they didnt do that with this phone, although I am sure it would be a battery nightmare.