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Compare right focused side with left unfocused side.

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    Did you mean to post an example? – Please Read Profile Nov 1 '19 at 15:37
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    Have you looked to see if there's any visible dirt or scratches on the lens area? – Nate S. Nov 1 '19 at 16:21
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    Have you checked the lens for smudges? Fingerprints on a smartphone's camera lens can make the images very blurry. – Michael C Nov 1 '19 at 16:40
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If the lens cover is not visibly damaged/polluted, and it is not a focusing issue rooted in your composition habits, the assumption with any camera (from smartphone to DSLR) showing such problems is that there are tilting or decentering issues - vulgo, a lens element or the sensor got knocked out of whack.

It could also be a defective optical stabilization system (these systems basically work by causing controlled decentering).

If the problem persists, it is likely that the camera module in that phone will need to be replaced by a repairman (if it is replaceable at all).

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