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Some menus provide "Battery Cycle" counts which show true wear and tear.

⚠️ Never change a setting unless you have documented the original value. Most service menu changes take effect immediately without a "Save" button. To help you find the right tools, let me know: Your specific device model (e.g., S24, A54). What problem you are trying to solve. Some menus provide "Battery Cycle" counts which show

Modifying settings in these menus can lead to unintended consequences: To help you find the right tools, let

: The General Test Mode (Standard for most Galaxy phones). *#0011# : Service Mode for network and Wi-Fi status. *#1234# : Displays current software and PDA versions. *#2222# : Shows hardware version. The Risks of "Secret" Menus *#0011# : Service Mode for network and Wi-Fi status

It is a built-in firmware interface hidden from the standard UI. It allows access to:

Use *#0*# to ensure the screen has no dead pixels and all sensors work.

Overclocking or pushing audio levels too high can blow speakers or overheat chips.