Vivo y66 mobile phone can receive short messages, but what if there is no prompt tone?

Check your settings, then enter the ringtone to see if the ringtone volume is not set, turned on and restarted.

Do you want to turn on the ringtone volume? Press the phone side key to increase the volume of the phone.

Check whether the setting of SMS reminder sheet is correct, including information, menu, settings, universality and prompt tone, and check whether the prompt tone is set.

Check whether the Do Not Disturb function is turned on.

If not, it is recommended to make a backup first, and then restart the phone to restore the factory settings. Backup, system tools, backup, new backup.