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What's wrong with Samsung I9 100 without sound?

It is recommended that you:

1. Settings-Accessibility-Hearing mute lock with sound off.

2. When talking or playing music, adjust the volume key on the side of the phone.

3. If there is no sound in the speaker during a call or music playing, please back up the data in the phone and try to restore the machine to the factory settings.

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