A smiling face appeared in the prompt bar on Samsung mobile phone.

When a phone call or transfer to a phone, a smiley face icon will appear. I suggest you:

1. Because the third-party mobile phone dialer may have some other functions, it is recommended that you use the built-in dialing function.

2. Turn off third-party security software such as mobile guards.

3. Since installing the third-party theme software may modify the caller ID screen on your mobile phone, it is recommended that you try to switch to the default display.

4. If the smiley face icon still appears after the above operation, it is recommended that you back up important data and restore the phone to factory settings.