Radio UI: How to assign External Keys to EPTT Channel Up/Down
1. For Channel UP: Settings→Programmable keys→External speaker key→ Set to
EPTT (plus) channel
2. For Channel DOWN: Settings→Programmable keys→Call list key→ Set to
EPTT (minus) channel
Note: Once you assign the external keys to EPTT Channel Up/Down, you will no
longer be able to use the left/right Nav keys to change channels.
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