I have a F900BT with mic issues
Heres the story
Bought one F900BT on Ebay that would lock up on splash screen
Brought it back to life and upgraded it to 3.0 using the directions found here 
The mic however would not work
No voice command no phone conversations
I would phone people and it would just be dead air
Confirmed mic was working cause i use the mic with a F7010BT and it works fine
So i assumed the mic jack was bad or maybe a problem with the board.
Sold that unit stating that the mic didnt work
Now i have bought a second unit with the same issue locking up on startup etc
Also brought it back to life and upgraded to 3.0 per the forums
But having same mic issue
Mic doesnt work with voice commands or phone but everything else works perfect.
Once again i confirmed mic is working on F7010BT
So i am thinking the chances of getting two units with bad mic jacks has got to be pretty slim
Has anyone got any ideas as to what it could be ?
Thanks
