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After a few days I replace the lcd and touch screen for iphone 6s plus,I found that my phone got a little ghost touch,example - when I touch the gallery icon I get inside the message like I touch the message icon,other part on the screen is ok,just I need touch several times for the gallery icon just will worked…will it be the connector problem ?please answer,urgent,thank you

Could be a connector issue. Could be a faulty screen. Id try re-seat the connector and if that doesn’t work purchase a new screen. I assume the faulty one is fully installed so its unlikely your supplier will warranty it