Rooting my Rockchip 2918 built-in 3g m901-w device android 4.0.3

[burtugey]

I was having a difficulty to root my device. I tried in many ways Universal Root, Ginger Break and via command Adb, but none of them worked for me.
My device details:
9.7"
Rockchip 2918 built-in 3g
cpu 1.2 GHz
RAM 1 GB
ROM 8 GB
Model Number:M901-W
Android Version: 4.0.3
Baseband Version: MW100G_BASE_V300R20
Kernel Version 3.0.8+
yangil@wh-giayee#127....


this system info as it is:

Android version : 4.0.3
Release Codename : REL
API LEVEL : 15
CPU ABI : armeabi-v7a
Manufacturer : unknown
Bootloader : unknown
CPU ABI2 : armeabi
Hardware : rk29board
Radio : unknown
Board : rk29sdk
Brand : Android
Device : rk29sdk
Display : rk29sdk-eng 4.0.3 IML74K eng.yangjl.20120605.185239 test-keys
Fingerprint : Android/rk29sdk/rk29sdk:4.0.3/IML74K/eng.yangjl.20120605.185239:eng/test-keys
Host : wh-giayee
ID : IML74K
Model : M901-W
Product : rk29sdk
Tags : test-keys
Type : eng
User : yangjl

Any other info please ask me as soon as possible I posted in XDA-developers but no answer from them.
Build Number:SY_M901-20120605.