Open the Samsung Calculator app and type this exact sequence, including the starting parenthesis. Upon typing the final + , the app should automatically switch to a hidden system menu.
From here, you can enter further dialer-style codes (like *#9900# ) to access the SysDump menu, which allows you to delete junk system logs or change debug levels to improve performance. Popular Samsung Diagnostic & System Codes samsung calculator secret codes
View advanced network information like signal strength and frequency bands. Useful "Non-Secret" Calculator Features Open the Samsung Calculator app and type this
See the "RF Cal" date to determine when the phone was manufactured. *#0011# samsung calculator secret codes