It’s a theft-protection measure. If someone steals your phone, the locked flag prevents them from simply wiping it and installing a fresh OS to bypass your passwords.
Go to Settings > Additional Settings > Developer Options > Mi Unlock Status . Tap "Add account and device." (You must use mobile data, not Wi-Fi, for this step). flashing lock flag is locked please unlock it first full
Some brands require a specific unlock key or a waiting period (often 168 hours for Xiaomi devices) via an official unlock tool. It’s a theft-protection measure
Many budget devices from manufacturers like BLU or older Spreadtrum (Unisoc) devices simply lack the standard fastboot flashing unlock command in their bootloader. In this case, the official method won't work. You will need to research chipset-specific tools such as the "SPD Research Tool" for Unisoc devices or "Mediatek Flash Tool" for MTK devices to flash your custom image directly, potentially bypassing the lock flag in a different way. Tap "Add account and device
This error is most frequent in the following modules and transactions:
Press and hold the Child Lock button, or hold Delay Wash and Pre Wash together.
Run the Mi Unlock Tool, log into your Mi Account, and click .