Some menus provide "Battery Cycle" counts which show true wear and tear.
To access these, you usually type a code into the stock Phone app dialer: Some menus provide "Battery Cycle" counts which show
Overclocking or pushing audio levels too high can blow speakers or overheat chips. Some menus provide "Battery Cycle" counts which show
Checking pixels, vibration, sensors, and speakers. Some menus provide "Battery Cycle" counts which show
Use *#0*# to ensure the screen has no dead pixels and all sensors work.
Samsung service menus (often called "Service Mode" or "Secret Menus") are hidden diagnostic tools used by technicians to test hardware and calibrate settings. While they offer deep control, they can be risky for average users. What is the Samsung Service Menu?
Use the network menu to see if your SIM is actually connecting to the right bands.