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The third generation of the LG Optimus F subseries, released in June 2013, identifiable by the model number LS720.

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My speaker only works when I press the surrouding area.

When talking on the phone I have to press under the camera lens to make the speaker work. Seems like a cold solder joint break. Repairable? Worth the trouble? Thanks.

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There are contacts inside the device most likely where the speaker must be pressed against to function correctly. Has the phone been taken apart?

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