I am using this tablet since one year and about seven to eight times I have to go to customer care center for this tab.
This tab has following problems as I am describing. And this was my personal experience.
This tab had inbuilt problem that the current flows back to the charger which takes too much time to charge a tab.
Secondly, The dust enters in the screen and camera which causes blurrance in the camera and screen looks to dirty.
It’s touch response is not too good sometimes you yap anywhere else and it response your tap anywhere else.
And it does not give option to send apps to memory card, you can send it only to phone storage, though which you cannot install big apps.
Lastly, after one year I am experiencing that it takes more than half an hour to restart the tab. And also some files automatically installed in the system which causes hang on tablet and does not able to uninstall those files.
These are some common problems I have experienced in this tablet.