Why was the phone call discarded?
| Constructor | Description |
|---|---|
| phoneCallDiscardReasonMissed | The phone call was missed |
| phoneCallDiscardReasonDisconnect | The phone call was disconnected |
| phoneCallDiscardReasonHangup | The phone call was ended normally |
| phoneCallDiscardReasonBusy | The phone call was discarded because the user is busy in another call |