Samsung a8 has no sound, so it is useless to restore the factory settings.

If there is no sound on the phone, it is suggested that:

1. This may be because the option to turn off all sounds is set. I suggest you turn off all sounds through phone settings-(My Device)-Accessibility-(Monitoring) and uncheck it.

2. Set-Sound-Volume and try to turn up each volume.

3. If it is invalid, please back up data (contacts, multimedia files, etc.). ) and restore the phone to the factory settings.

If the problem still exists, please take the purchase invoice, maintenance card and machine to Samsung service center for inspection by engineers.