Hello! I bought an ebook reader,with system RockChip RK2738 SDK (version 1.1.1 touch) before a week.It's the chinese one,with many brand names,like Mebook Reader as the most well knowned. From the first time using it,since now,it shuts down after 3 minutes (although I didn't select that option) and after that all my data are lost! The weird thing is that all settings are lost too,except the date and time.. I tried to contact the seller,and the only thing he could tell me in english was to format it-which I tried,with no luck several times,unless I do it wrong! I tried to contact another seller with chinese products,and they suggested me to do a factory reset,but they don't know how that can be done (no such setting) Can someone tell me what can I do,or if there's a possibility to change firmware to make it work? (and how that can be done?) Any suggestions welcome! Thanks in advance!