Map the PTT button on the CAT S60
Mapping the PTT button on the CAT S60 will allow you to use the PTT button for sending voice messages on Zello. The dedicated PTT button will also bring Zello to the front when in the background, and unlock your phone.
Follow the instructions below to map the dedicated PTT button to Zello on the CAT S60.
1. Open the Android Settings > Programmable Key. Turn on PTT mode
2. Under your Zello Options > Push-to-talk button, make sure that "Handle dedicated PTT button" is checked.