gtmob
Quote: it doesn't have google play store
Until you get a better reply I would suggest you root your device first
Since you have Mediatek try this first Framaroot
Secondly download gapps as per
http://www.chinaphonearena.com/forum/Thread-Tutorial-How-to-flash-gapps-install-update-from-SD
Thirdly, go into system settings -> security (under Device management) Tick the box for Unknown sources
----to allow installs of apks from the SD card
Then go into SD card and click on apk.
If I am too confusing for you, please start a new thread in the correct forum
which I hope is
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Sorry if I am rude, but your question does not appear to relate to OP
good luck
EDIT
I have changed my mind on recommending the CPA method of gapps
instead, use system settings to find out what version of Android you have
next, google terms= ultra slim gapps
eg 4.2.2
good luck