Nothing happens! at the beginning of the problem very rarely it vibrated and tried to calibrate the camera, as if it wanted to restart, however it didn't finish calibrating the camera and didn't even turn on the screen.
I answered a similar question in Q&A, the second post. That is if you can only boot into fastboot mode. but it also works if you are stuck in a bootloop or any other software issue.
If you can't even power the phone on, you will need to use a hair dryer or heat gun to remove the back and then disconnect the battery, then plug in a usb cable to see if the device still powers on. if it does unplug it and reconnect the battery. then try powering it on again.
If you unplug the battery and plug in a usb cable and it still does nothing, then it is completely bricked and probably beyond the technical expertise an average person is willing to put in to attempt to fix.
I keep getting this error: "failed to unlock your device, please try again later".
Factory reset over and over, serial is in settings, brand new phone out of the box today. I added a google account after factory reset, nothing, I gave it Asus account after factory reset, same error.
What can I do? Should I do the firmware/software update?
For anyone reading this, wondering why there isn't a more descriptive error:
Unlocking your bootloader on this model goes against what a lot of us have learnt over the years. The general rule of thumb is never to update before unlocking, as the procedure for unlocking is specific to a certain release, and manufacturers frequently remove the ability to unlock in later releases.
Why they do this is obvious, they don't actually know what people will do with their hardware given the appropriate power to do so.
In the case of this phone, you do have to do the firmware update before the current unlock tool will work, as at the time of writing.
You don't need a Google or Asus account or any other crap.
Hope this helps someone else.