How To Use Secret Codes On Poco X6 Pro Free (QUICK | 2025)

What secret codes are Secret codes (sometimes called USSD codes, MMI codes, or Android secret codes) are entries that invoke hidden activities or system intents. They usually start and end with special characters like * and # (for example, # #4636# # ). Some codes are standardized across Android builds; others are vendor-specific (MIUI/Poco) or carrier-customized. The codes simply trigger software components already present on the device; using them doesn’t require extra apps or payments.