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I bought this piece of crap (boox m90). It came with an unofficial version of firmware (2011-10-20) and it's terrible. I wanted to use it for pdf viewing. That's working but no dictionary, no text to speech and many hang-up... It's almost useless!
After a day of usage I noticed that the pen is miscalibrated. I calibrated it a few times and it remained miscalibrated. The "calibrate stylus" option in the settings does nothing! I tried it with unambigously wrong points and it accepted and the calibration remained the wrong factory defaults! It misses almost half an cm at the left and right side of the screen.
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