Why is my OTG not working.

Jun 26, 2018
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My ZTE E7LS tab is recognizing mantra scanner befor and now if inserted it would not show, I try factory reset and still the same problem I still try force reset and still i t didn't work.
 
Have you selected the proper USB setting? (I don't know how it's worded by ZTE, but Google calls it "supply power".)