Smile O2 - ST20F freez on O2 NEED HELP URGENT

hi i am new to flash xda phones. i am having O2 - ST20F which freez on O2. I want to flash d phone. In bootloader mode it is showing
Typhoon I pl 1.00
Typhoon
SPL 2.05.0068
with witch flash file i have to flash d phone & from where i will get d flash file for this model , tell me flash procidure also.Thanks in advance.