This isn't referring to carrier unlock, but rather unlocking your bootloader so you can flash a new version of Android. At the bottom of the Fastboot screen, there should be a line that says "LOCK ...

Some manufacturers include helpful information right there on the fastboot screen, including (you guessed it!) the OEM lock status. If thatâ s your phone, you donâ t need to do anything else here.

Xiaomi MIUI Fastboot Screen With Mi Bunny (Mitu) Ever since Xiaomi started selling smartphones, it has been popular among the modding community. In fact, its devices are most favored by developers.

In addition, the new Fastboot update for Android M brings a new set of flashing commands that offer better control over when and what should be written, once the device is in locked or unlocked state: ...

Android 10 is here—for Pixel devices, ... Finally, I rebooted my device one final time by selecting the “Start” option on the fastboot screen (using the power button, ...