During an ongoing call, you have the following options:
mute -Prevents the other party from hearing your voice and any background noise.
dialpad - Enter a phone number using the dialpad.
speaker - Play audio using the speaker on your mobile device.
hold - Place the caller on hold.
transfer -Transfer an active call to one of your contacts or another phone number
end call - Tap the red phone icon to end the call.
chat - Tap the chat icon in the top-right corner to chat with the caller (if possible).
back - Tap the arrow in the top-left corner to navigate back to the last page you visited.