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SOUND
Bluetooth
Unfortunately, Bluetooth audio available only on Android side (smartphone, apps) and does not work on the RFinder side.
There's been chatter about RFinder creating a Bluetooth dongle for the RFinder side.
Bluetooth
“Echolink app uses the phone volume on the side and not the volume knob for the radio assuming you don't know..”
Slow Speech
If using Mint Mobile and hearing slow speech, set the APN Protocol to IPv4.
On B1-Plus: Settings / Network & Internet / Mobile Network / Advanced / Access Point Names / T-Mobile US LTE / APN Protocol / IPv4
Volume Boost
Feature added v13.26.
Available via OPTIONS button
To unboost, turn the volume knob counter-clockwise