SPD 6610/20 fully support now in 2.12
see test report here 
Code:
Initializing...
DA_LIB_VER_4.0.3.2
It is sensing the pinout fast...
RXD=18 TXD=17
Connecting...
Connected...sending boot...
FDL test...OK
ArmBootMode: 6610000000E26A00_00
Wait for init Commzero Security Engine...
Done.
Loading bootloader...
Done.
Changing baudrate...
Set baudrate to 115200 is ok
Reading phone HW info...
Read info is done.
CPU: SC6610/20 Flash: SF_GD25Q32
setting the Flash Parameters...
Settings have been completed!
setting the Serial Flash Parameters...
Settings have been completed!
Unlocking all blocks before program/erase...
Unlock Done.
Programming...
Compare Image: Enable
All Done.