Thanks.
Finally.
Over the weekend, I manage to do the firmware upgrade, after a few tries.
For those who have the same problem as me,
the procedure should be :
1. Insert the memory card with the firmware.
2. Make sure the phone is power off.
3. Press the “-” volume button and hold onto it. Then together with the power button.
4. Wait for 3 seconds.
5. Then release only the power button.
6. The phone will start to boot up with yellow words for updating.
7. You can then release the “-” volumn button, when it starts to update.
After that, you will be able to access play google market like any branded handphone.
Now, I have to figure a way to fix the memory slot, the memory card keep jumping out.
I may have to open it.