galaxy tab 4 clone

Hi all,
please I need help , I have galaxy tab 4 clone Chinese ,
the problem is the tablet closing the apps and hang a lot and when I open any game or connect to wifi after sometime I got the tablet freeze , I am trying to find the firmware but I cant find what is the right one for
this tablet. please if any one can help me to find the solution .

I connect it with MtkDroidTools software and I got this info :

Hardware : MT6577
Model : A9
Build number : ALPS.JB.MP.V1.18
Build date UTC : 20150505-021121
Android v : 4.1.2
Baseband v: MAUI.11AMD.W12.22.SP.V25, 2013/11/01 20:23
Kernel v : 3.4.0 (xy@xy-All-Series) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #1 SMP Mon May 4 18:57:58 CST 2015

Thanks