WhatsApp for Samsung Galaxy Beam2

During an active WhatsApp call, tap the speaker/audio icon on the call screen and select your paired Bluetooth device from the output list, since WhatsApp often defaults to the earpiece or speaker. If it still won't switch, go to Settings > Bluetooth, tap the settings icon next to your headset, and confirm Call audio is enabled, then unpair and re-pair the device. Make sure the headset is fully connected before you start the call rather than switching mid-call. See how others solved this on Reddit

Open Settings > Bluetooth, tap the settings icon next to your earbuds, and verify that both Call audio and Media audio are toggled on. If calls still route to the phone, forget the device and pair it again, then clear WhatsApp's data under Settings > Application manager > WhatsApp so it re-detects the audio route. Restarting the phone after re-pairing often forces the call profile to register. See how others solved this on Reddit

Check that Media audio is enabled under Settings > Bluetooth by tapping the settings icon next to your earbuds, as some headsets only auto-enable the call profile. If audio still comes out of the phone speaker, turn Bluetooth off and back on, or unpair and re-pair the earbuds, which usually clears a stuck output route. Confirm the earbuds show as Connected before playing the voice note. See how others solved this on Reddit

Cutouts are usually interference or distance, so keep the phone within a few feet of the headphones and away from Wi-Fi routers or microwaves, and make sure the headphones are charged. On the phone, go to Settings > Bluetooth, forget the headset and pair it again from scratch, and turn off Power saving mode under Settings > Power saving, which can throttle the Bluetooth connection. If it persists, try the headphones with another phone to rule out a hardware fault. See how others solved this on Reddit

Bluetooth earbuds connect to one device at a time for active audio, so if they're paired to a second device that device may grab the audio instead of the Beam2. Disconnect or turn off Bluetooth on the other device, then in Settings > Bluetooth confirm the earbuds show as Connected to the Beam2 before opening WhatsApp. During the call, tap the in-call audio icon to verify the earbuds are selected as the output. See how others solved this on Reddit

First confirm the earbuds are connected and selected as the audio output, then check that Media volume isn't muted by pressing the volume up button while audio is playing. If it's still silent, go to Settings > Bluetooth, forget and re-pair the earbuds, and reboot the phone to reset the audio. Installing any pending update under Settings > About device > Software update can also fix Bluetooth audio bugs. See how others solved this on Reddit