Try these steps first if your Samsung Galaxy S6, S6 Edge, S7, or S7 Edge is experiencing touchscreen issues such as being over sensitive, under sensitive or having buttons and apps opening randomly as if from a ghost.
-The code is *#2663#
-If this does not work then try *#*#2663#
-If these two do not work then look up your carrier/model and google it to find the TSP Update Code
Let me know if you still need help.
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