[cyang]

Originally Posted by knc1

What is a KP2?
https://wiki.mobileread.com/wiki/Kindle_Serial_Numbers
We give the models names based on serial numbers for a reason:
Hint: Just because the ourside says "Kindle" does not mean the insides (electronics) are all the same.

Thanks for replay.
It's my bad. My devices is Kindle Paperwhite 2, s/n is 9017 0000 0000 0000.