c3303 usb flash driver
driver c3300k.rar 
press "volume up" + "lock" and connect USB cable to phone
press frmware button
here is log
Selected model: C3303
Selected com port: COM1
Selected speed port: 921600
Press "volume up" + "lock" and connect USB cable to phone
Connect to control pipe... OK
Processor ID -> 0A33
Sending loader... OK
Connect to control pipe... OK
Connect to write pipe... OK
Connect to read pipe... OK
Sending part LCDACT:
Erasing... OK
Sending... OK
Sending part MAIN:
Erasing... OK
Sending... OK
Sending part DSP:
Erasing... OK
Sending... OK
Sending part ROOT:
Erasing... OK
Sending... OK
Sending boot sector:
Erasing... OK
Sending... OK
Sending TFS... OK
Sending CSC... OK
Download - ok
Elapsed time: 826 second, sw ver: 3.5.0021