Here are some information about PC 2 in Russian, anyone knows the language of Russian could take it as a reference.
http://4pda.ru/forum/index.php?showtopic=796107
http://mysku.ru/blog/aliexpress/49028.html
https://www.youtube.com/watch?v=oUb4TsnDqcU&t=2s
Shared by Mamaev Kamil' Abdurashidovich
