The motherboard locks the drive at boot to prevent unauthorized malware from messing with the firmware. Power Cycle:
It sounds like you're dealing with a system message or error notification—likely from a smartphone, tablet, or other device with a , FRP (Factory Reset Protection) , or a security lock feature.
If your phone is "bricked" (won't turn on) and the lock flag is stuck, some users use EDL (Emergency Download) Mode . This often requires "test points" (physically touching pins inside the phone) or an authorized account, which is generally not recommended for beginners. Why does this flag exist? flashing lock flag is locked please unlock it first full
Shut down completely, unplug the power, wait 30 seconds, and reboot.
Press and hold the Control Lock button for 3 seconds. The motherboard locks the drive at boot to
Some devices are (e.g., certain US Samsung models, Verizon phones). In that case:
| Device/Error | Likely Fix | |--------------|-------------| | "Lock flag is locked" in fastboot | fastboot flashing unlock | | "Flashing not allowed in locked state" | Unlock bootloader first | | "Please unlock device to flash" | Boot to OS → enable OEM unlocking | | "Flashing lock flag is locked" (MediaTek) | Use SP Flash Tool with "Format All + Download" (risky) | This often requires "test points" (physically touching pins
Think of it like a light switch on the wall.