Access advanced network info, signal strength, and usage statistics. *#*#3646633#*#*
If adaptive brightness is too aggressive:
Secret codes are not dangerous if used correctly. However, some codes (like factory resets) can erase your data. Always back up your phone before experimenting. How to Use Secret Codes on TECNO Spark 20
Secret codes on the are powerful shortcuts that transform your dialer into a diagnostic control panel. While you may never need most of them, understanding Engineer Mode and the basic sensor tests can save you a trip to the repair shop.
: Displays your device's unique International Mobile Equipment Identity (IMEI) and serial numbers. Use this for TECNO Warranty Checks *#*#4636#*#* Testing Menu Access advanced network info, signal strength, and usage
. These commands allow you to check hardware health, verify your warranty status, and view advanced network information that isn't typically available in the standard settings menu. How to Enter Codes To use any of the codes below, simply open the Phone/Dialer
Use them wisely, and your TECNO Spark 20 will feel like a much more transparent and controllable device. Always back up your phone before experimenting
Secret codes (also known as or MMI codes ) are numeric strings entered into your phone’s native dialer. They trigger specific actions—from displaying your IMEI number to running a full hardware test.
Q: What are secret codes? A: Secret codes, also known as USSD codes, are a series of numbers and symbols that can be entered into your device to access specific features, settings, and information.