Factory 2.1.2 on x12 is actually equivalent to 2.0.6 on previous devices.
It is necessary to change the necessary and carefully read the new instructions, which will be in the internal memory of the device.
In addition to the official 2.1.2 laid out on the site, there is also quite official, which PocketBook was afraid to lay out.
The so-called 2.1.2 Fastupdate
http://www.the-ebook.org/forum/viewtopic.php?t=22200As far as I understand, all the closed PocketBook testers put it :)
It is a bit more buggy, but noticeably faster, in some cases some artifacts are possible on the screen, but rarely.