Xabber
It appears the IronChat app uses the open source Xabber (from XMPP and Jabber) if the APK I found on:
https://ironphonestore[DOT]com/ is the "official" app repository for these phones.
https://en.wikipedia.org/wiki/Xabber
It appears the IronChat app uses the open source Xabber (from XMPP and Jabber) if the APK I found on:
https://ironphonestore[DOT]com/ is the "official" app repository for these phones.
https://en.wikipedia.org/wiki/Xabber