On Samsung Galaxy S9 - How To Use Secret Codes

If you suspect your battery health is degrading, this code opens the menu. It provides a detailed breakdown of your current battery level, voltage, and temperature. It is far more technical than the standard settings menu and can help diagnose charging issues.

✅ *#0*# , *#0011# , *#0228# ❌ Requires unlocked or engineering firmware: Most *#2263# (band selection) ❌ Factory codes: Assume they are disabled unless proven otherwise.

Allows you to check and refresh your Wi-Fi and Touch Key firmware versions. How to Use Secret Codes on SAMSUNG Galaxy S9

This code is essential for verifying the authenticity of the software. It displays the .

This is a universal Android code that works on many devices, including the S9. It opens a menu with four sections: If you suspect your battery health is degrading,

*#0011#

Veteran Samsung users remember the "Samsung Secret Codes" app from the Galaxy S3/S4 era. The S9 still retains legacy codes for backward compatibility: ✅ *#0*# , *#0011# , *#0228# ❌ Requires

On the Samsung Galaxy S9 (running One UI based on Android 10), most codes follow the structure: *#*#<CODE>#*#* or *#<CODE># .

An alternative diagnostic menu often used on carrier-locked devices to test melodies and speakers. USB Settings