This Post For THose Spd Mobile Which is Not Detecting.
If you Have Spd 6531 device and can’t detect via volcano and you don’t know boot key and no have boot point on board.
then open board and find TX pinout and short with GND.
Then do your Job..its work like a Magic.
[B]Note:upcomming 6531 Based Mobile TX point Can Be Found On Charging Jack Point 4 work as boot point.