So you flashed the wrong firmware, and now the router is dead (no lights, or only a red LED). Don't panic.
ZTE MC801A B12 update : Bridge mode broken - Three Community
: Incorrect installation or using incompatible files can lead to a "bricked" state, rendering the hardware permanently unusable.
: Click Check to see if a new version is available. If found, select Apply to download and install it.
: The device will automatically restart once the installation is complete. Method 2: Manual Flash via Software Tool
So you flashed the wrong firmware, and now the router is dead (no lights, or only a red LED). Don't panic.
ZTE MC801A B12 update : Bridge mode broken - Three Community zte mc801a firmware flash
: Incorrect installation or using incompatible files can lead to a "bricked" state, rendering the hardware permanently unusable. So you flashed the wrong firmware, and now
: Click Check to see if a new version is available. If found, select Apply to download and install it. So you flashed the wrong firmware
: The device will automatically restart once the installation is complete. Method 2: Manual Flash via Software Tool