I replaced twice the glass frame for Lumia 535. First one didn't react to my touch after replacement. I discover later there are different models of glass frame for Lumia 535. The first seller just said it was for Lumia 535. But when I checked orginal glass frame, there was reference number:CT2S1973FPC-A1-E which wasn't corresponding to my first purchase (CT2C1607FPC-A1-E). Someone said there is another reference number for Lumia 535, so total would be three kinds. Make sure you buy the replacement piece not by the telephone model, but also exact reference number. The reference number is visible in the back connection between the glass frame and the panel connector. Good luck for everyone.