Smart industry phone. The rugged smartphones from Caterpillar, a manufacturer of construction equipment, are entering the next round. On the outside everything stays as it is, but on the inside some improvements have been made. In our test we found out what exactly is new about the extreme outdoor smartphone Cat S31.
https://www.notebookcheck.net/CAT-S31-Smartphone-Review.275898.0.html
Cat S31 is the perfect phone for push-to-talk communication! It has Programmable Key which can set as PTT button, and it has front-facing speaker which definitely makes it easier to talk while looking at the screen.
However, need to make sure the PTT app can respond to the Programmable Key settings. Download VoicePing from PlayStore, a PTT App that definitely works with CAT S31.