Fairly reliable, but could use a few improvements.

-Bug fix: The description of the offline status states "Disconnect Zello and receive push notifications only (when enabled)." I have ensured that I have enabled push notifications in the settings, but do not receive them after going "offline." I had no idea that people had been trying to talk to me.

-Feature suggestion: I find that the app is a little difficult to navigate when going between different contacts, carrying on separate conversations. My suggestion would be for some type of PTT button on each contact within the "contacts" and "recents" lists. This would make it much easier to go between contacts.

-Feature suggestion: Why not have the status available at the top of the app at all times with some type of drop down list? I would think that this would make it much easier for the person signed on to see the currently set status, and change it if needed. This would be similar to the setup of several different instant messaging programs.

All in all, Zello is a very useful and reliable app, but I believe that the above things could greatly improve its functionality.

IBJack about Zello Walkie Talkie, v3.37