Selling your smartphone is a quick way to make some cash. But a study published last week by the security firm Avast, in which the firm bought some used Android phones and recovered thousands of “erased” personal files, stands as a good reminder that you have to think carefully before you sell.
The study looked at 20 phones made by HTC, Motorola, Samsung and LG. According to Avast researchers, the phones ran several different versions of Android. Some, the company said, were running Android Gingerbread (version 2.3); most were at least up to Android Ice Cream Sandwich (versions 4.0.3-4.0.4).
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