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Did you know your TCL 40 R 5G has a hidden diagnostic menu? Learn how to use Android secret codes to test your screen, camera, and signal strength quickly. If you own a TCL 40 R 5G , you already know it’s a solid budget-friendly 5G phone. But did you know that hidden beneath the standard settings menu lies a series of “secret codes”?

Unlock Hidden Features: How to Use Secret Codes on the TCL 40 R 5G

These codes (known as USSD or MMI codes) allow you to run hardware diagnostics, check your IMEI number, and access information that isn’t available in the normal settings app.