How+to+use+secret+codes+on+samsung+galaxy+a7+2+work File

Using these codes is simple and does not require any third-party applications.

Code: *#0808#
Action: Opens USB settings (not a test per se but allows you to switch between MTP, ADB, and charging modes).
Warning: Do not change these settings unless you know exactly what you are doing—you could disable file transfer. how+to+use+secret+codes+on+samsung+galaxy+a7+2+work

Code: *#0228#
Action: Displays detailed battery information.
Data shown: Voltage, temperature, battery level percentage (raw), and charge/discharge cycles.
Warning: Do not press the "Quick Start" button unless you want to calibrate the battery (this can cause temporary voltage drops). Just read the data and press "Back." Using these codes is simple and does not

Code: *#0283#
Action: Checks microphone, speaker, and modem voice path. Useful after water exposure or muffled call quality. Code: *#0808# Action: Opens USB settings (not a

Code: *#0588#
Action: Immediately tests the proximity sensor (used for turning off the screen during calls).
Result: Cover the top front of the phone with your hand. The screen should say "PASS" or "PROXIMITY – ON."