The iPhone 6 Plus LCD & Touch Screen Tester Flex Cable. This useful flex cable tester makes it easy to check the functions of an iPhone 6 Plus replacement screen assembly without having to complete the installation and close up the iPhone’s case. It is a necessity for anyone who makes numerous iPhone 6 Plus repairs. With this testing flex cable installed in an iPhone 6 Plus body you can connect, test and quickly swap multiple LCD and touch screen digitizer assembly replacements without damaging the delicate press fit connectors on the logic board.