This tablet is basicaly a Lenovo A2107 (A2107A_A404_010_002_120913_VODA)
- with single sim slot ( call feature restricted - only data enabled) and 4gb storage (1.8 gb user available)
For root - you can use http://forum.xda-developers.com/show....php?t=2044496
User isyrider managed to install recovery and pemergency rom unlocking the calling feature also.
I was looking for a way to swap the internal storage with the sd card so I could get more space if posible without installing a custom rom to avoid incompatibility issues that could appear. Directory bind can help with big game files like gameloft but those 2 gb are still not too much . I was unable to install N.O.V.A 3 because it requires 1.81 gb free on sd.
Anyway long story short . To swap internal memory with SD card you need to have root and replace your VOLD.FSTAB file from system/etc with the one I attached.
You need to have root .
Use any root explorer.
Rename your VOLD.FSTAB to VOLD.FSTAB.BAK
Copy my VOLD.FSTAB to system/etc
Check in settings, You will see your sd card listed as internal memory.
This combined with link2sd app will give you plenty of space to install anything .
Hope this helps .