I upgraded my Motorola ES 400 firmware and lost the PTT key mapping.

We believe that was caused by a change in the firmware. To make the side button available for Zello please perform the following steps:

1)      Go into key remap utility and select “Library – reset All” to establish a common baseline

2)      Next map the PTT button to hard keyboard – PTT (short press) [basically remap PTT back to itself]

Questions? Contact us or submit a new ticket for support-related inquiries.