Why don't I see the option for voice calls?

Please follow these steps to troubleshoot: 1. Click [here](hellotalk://profile/setting/privacy) to go to Privacy and check if the "Receive Voice Calls" option is turned off. 2. If it's turned off, please turn it on. 3. Close the app and relaunch it. 4. Go to a chat conversation page and check if the voice call icon appears in the top right corner.