Honor 400: Unlock Secret Codes and Hidden Menus for Diagnostics and Settings

Accessing Secret Codes on Honor 400

• 📱 Open the dialer on your Honor 400 to begin entering the special secret codes.

Device Information and Diagnostics

• 🔢 Enter *#0606# to quickly view your device's IMEI numbers and serial number.
• 🔬 Access the diagnostics menu with the code *#*#426#*#* to check server host, port, time, and events.
• 📊 Further advanced diagnostic information, such as heartbeat lasting and HB algorithm, can be found by tapping on 'status' within the diagnostics menu.
• ℹ️ The About Phone menu is accessible via *#*#40#*#*, providing details like model, build number, and IMEI numbers.

Project Menu and Advanced Settings

• ⚙️ Unlock the Project Menu by dialing *#*#2846579#*#* for advanced options.
• 🔌 Within the Project Menu, you can manage background settings, USB port settings, and AP log settings.
• 🌐 Explore network information queries, such as SIM lock status, and vendor or country information.
• ⬆️ The Project Menu also allows for software upgrades from a memory card or standalone APK upgrades.
• 🔋 For battery-related issues, navigate to the battery section in the Project Menu to check the exact battery percentage, temperature, and charging status.