Como Utilizar Codigos Secretos En Zte Blade A51 Best [portable] Official

It sounds like you want to know how to use secret codes (also known as USSD codes, engineering codes, or diagnostic codes) on the ZTE Blade A51 Best.

Here’s a clear guide on how to use them, what works, and important warnings.

1. Testing Menu (Hardware Diagnostics)

Code: *#*#6484#*#* or *#*#4636#*#*

This opens the Testing Menu. You can test:

  • Touchscreen accuracy
  • Display colors
  • Speaker and microphone
  • Vibration motor
  • Proximity and light sensors
  • Rear and front cameras

How to use it: Dial the code. Tap each test option. Follow on-screen instructions. This is perfect for checking if your refurbished or second-hand A51 Best works properly. como utilizar codigos secretos en zte blade a51 best

5. Display & Backlight

  • *#*#0*#*#* (LCD test) – May cycle through colors (red, green, blue) to check for dead pixels.
  • *#*#2663#*#* – Touchscreen firmware version and touch test.

What are Secret Codes?

Secret codes are numeric strings entered into the phone’s dialer (keypad) that trigger hidden functions. These range from displaying device information (IMEI, battery stats) to running hardware tests and accessing engineering mode (MTK Engineer Mode, as the A51 Best typically uses a MediaTek processor).

3. Hardware Testing (ZTE/MTK specific)

  • *#*#6484#*#* or *#*#3646633#*#* – MTK Engineer Mode (most likely for A51 Best).
    Use with caution. Allows you to test:
    • Touchscreen
    • Camera
    • Sensors (accelerometer, proximity)
    • Audio (receiver, speaker, mic)
    • Bluetooth, Wi-Fi, GPS
    • Battery calibration (under "Battery Log")
  • *#*#3264#*#* – RAM and ROM storage information.

Safety Tips and Precautions

While these codes are not harmful by themselves, some can cause data loss. Follow these rules: It sounds like you want to know how

  1. Never enter a code that asks for a "Service Password" unless you are a technician. Guessing passwords can lock the radio permanently.
  2. Do not touch "NV Rebuild" or "Factory Test" options – these can delete calibration data unique to your device.
  3. Avoid codes containing *2767* – these are Samsung-style full resets and may brick a ZTE.
  4. Write down your IMEI before using any unknown code – if the phone resets without reason, you need the IMEI to use it again on a network.

What Are Secret Codes?

Secret codes are special number sequences you dial into your phone’s keypad (just like making a phone call). Instead of connecting to a person, the phone’s software intercepts the code and launches a hidden menu. These menus are primarily used by technicians, service centers, and advanced users for testing hardware, retrieving device information, and resetting certain settings.

Important Warning: Some codes perform immediate actions (like factory resets). Always read the description before entering a code. Do not share your IMEI numbers publicly. How to use it: Dial the code