Audio calls can use either Variable Bit Rate (VBR) or Constant Bit Rate (CBR). When using CBR, a corresponding label will be displayed on both the calling and the receiving side.
On Android:
To enable CBR:
- Tap
to go to Settings. - Tap Options.
- Toggle VBR off.
This will apply to both sides, and the whole call will use CBR.
To disable CBR/enable VBR:
- Tap
to go to Settings. - Tap Options.
- Toggle VBR on.
For more information, click here.