First the device specs.
Device: QMobile A900 MTK6589 dual sim chinese device.
OS: LG G3 Kitkat 4.4.2 rom.
Now the Problem
I am also facing this problem after attempting to re-size the partition using meteos mtk6589 rom edit apk and then did clear eMMC / Factory Reset using stock recovery (i think it formatted /data partition etc) .... Although my phone is still working properly without any issue, i am unable to root or install CWM by any means (tried mtk mobileuncle tools, tried spflash tool) but not working.
First, i tried to root using RootMaster vRoot, motochopper run.bat but failed. It did however installed SuperSU but when i start it says binary needs to be updated. I continue but it fails to update. I used RootChecker app to check the possible root but it says device is not rooted. I searched xda-forums and googled for a solution but couldnt find any. One person stated using Format whole flash to reset the partition table but i haven't done that worrying my phone will brick.
Secondly, i tried flashing cwm recovery using spflash tool (with new scatter file generated with MTKDroidTools). After flashing, it says All OK and shows green circle, however, when i reboot in to recovery, i get stock recovery and no CMW.
Please help me how to root my device and install cwm as i am unable to revert to my old backup taken with cwmr.