It wont go into flashing mode (hold U and plug into PC)
I tried taking out the battery and it actually behaves just the same without the battery. As in the led goes green, and nothing else happens.
So I will try to see if it might be the battery (which would be very weird since the phone is 3 months old xD )

I'll check the R&D mode now. Dont know what it is Thanks for the help guys. I'll try with another battery and report back