[Q] root nextbook 8 topic

Hello,
How can i root my tablet nextbook 8 premium SE ? I want to connect to internet via 3g usb modem ( my tablet is configured only with wi-fi).
Model : NEXT8D12F (NXM805ND_EN).
Android 4.1.1
Kernel 3.0.8
Build V2.0.5.JRO03.user.root.20130524
CPU CORTEX A9 1.5 GHz

I will be very thankful.

Bye.