I tried all three suggestions on that page. No matter what I did, the device would only reboot and show "=> FASTBOOT mode...". Nothing worked. 

How can I resolve this?

Yes, even after a factory reset, the problem is not resolved. I restart the device and get the initial "Blackview... Powered by Android" startup screen and then after a few seconds the screen is black with the text "=> FASTBOOT mode..." at the very bottom. Nothing else happens. S...

Recently purchased 100 devices and have an issue with one of them. Device booted up normally at first and I was able to access Wifi & log in to my gmail account. Got to the main screen and applied the Wireless Update as prompted. After the update finished, the device showed an icon of an Android...