How To Use Secret Codes On Samsung Galaxy M20 'link' -

This code is much safer. It resets only system settings back to default—network settings, display brightness, sound, etc. Your apps, photos, and contacts remain untouched.

Opens the USB settings menu. Here you can switch between:

| Code | Function | Risk Level | |------|----------|-------------| | *#2663# | Update TSP (touchscreen firmware) | Medium – don’t update unless necessary | | *#34971539# | Camera firmware details | Low – safe to view | | *#9900# | SysDump – take system logs | Low – helpful for bug reporting | | *2767*3855# | (wipes everything – no warning!) | High – avoid | How to Use Secret Codes on SAMSUNG Galaxy M20

These codes are used to verify if your hardware—like the screen, sensors, or battery—is functioning correctly. Codes for SAMSUNG Galaxy M20 - HardReset.info

These codes reveal internal data about your Galaxy M20—great for checking if your phone is genuine or verifying warranty status. This code is much safer

Displays the device-specific Specific Absorption Rate (SAR) value. Step-by-Step Guide: How to Execute Secret Codes

Enter this code to engage the vibration motor at full intensity. Useful for checking if your M20’s vibration motor is working after a drop. Opens the USB settings menu

Launches the General Test Menu for LCD, touch, vibration, and cameras. *#06# Displays the device IMEI number and hardware serial number. Battery Metrics *#0228#

Whether you are troubleshooting a hardware issue, checking the authenticity of your device, or simply exploring the technical capabilities of your phone, this guide will teach you everything you need to know about .