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

It is a built-in firmware interface hidden from the standard UI. It allows access to: Some menus provide "Battery Cycle" counts which show

Checking pixels, vibration, sensors, and speakers. Some menus provide "Battery Cycle" counts which show

Detailed signal strength and frequency band info. Version Info: Exact firmware and hardware revisions. Advanced Tweaks: Audio gain levels or USB settings. Common Codes for Smartphones Some menus provide "Battery Cycle" counts which show

To access these, you usually type a code into the stock Phone app dialer:

Modifying settings in these menus can lead to unintended consequences:

Changing the wrong boot setting can prevent the phone from starting.