Use Secret Codes On Samsung Galaxy S9 E...: How To

(especially from Verizon, T-Mobile, and AT&T) are heavily locked down. Codes like *#0*# often open an audio loop test instead of the LCD test. Other codes may simply vanish when typed.

Enables a Radio Interface Layer logging that fills your internal storage with huge log files within hours, potentially causing "Storage Full" errors.

This is arguably the most useful code for any Galaxy S9 owner. It opens the menu. This menu provides tiles that allow you to test every piece of hardware on your phone individually. How to Use Secret Codes on SAMSUNG Galaxy S9 E...

Unlock hidden menus and advanced diagnostic tools on your Samsung Galaxy S9 Go to product viewer dialog for this item. Go to product viewer dialog for this item.

Samsung Galaxy S9 and S9+ devices come with a hidden menu system accessed through . These "secret codes" allow you to run diagnostics, view device information, test hardware components, and access advanced settings not normally visible in the Android menu. (especially from Verizon, T-Mobile, and AT&T) are heavily

Secret codes are numeric strings (e.g., *#0*# or *#0011# ) that you type into the native Samsung Phone dialer. Unlike standard phone numbers, these codes are intercepted by the phone’s firmware before a call is placed. They grant direct access to the —a hidden realm usually reserved for engineers, repair shops, and advanced developers.

This code brings up the screen. It displays the manufacturing date, battery usage history, and usage count. If you are buying a used S9, this code is vital. It tells you exactly when the phone was built and how extensively it has been used, preventing you from buying a device sold as "new" that actually has months of wear. Enables a Radio Interface Layer logging that fills

: Allows users to "dump" system logs and delete unnecessary junk files, which can help improve device performance.