I have the same box. The toothpick method works (it worked for me) if you downgrade your android firmware to 05/08/2016 version (I had the October version before).
Can you explain better the fake.zip method? I didn't understand it.
Just create a file fake.zip on your SD CARD which contains LE.
Boot on android, insert your SD CARD, go to app called "UPDATE" select Fake.zip and Updgrade
Box reboot on LE