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The Samsung Galaxy A7 (2018 model SM-A750) has a hidden universe of diagnostic and information menus. To use these "secret codes," you simply enter them into the stock Phone/Dialer app as if you were making a call Essential Secret Codes for Galaxy A7

List of Secret Codes for Samsung Galaxy A7

Confirmed Working Secret Codes on Samsung Galaxy A7 (2nd Gen)

The following codes are confirmed to work for the Galaxy A7 series and related 2016/2017 models for various diagnostic and informational purposes: how+to+use+secret+codes+on+samsung+galaxy+a7+2+work