2013-09-21, 14:18
Fixed it already, simple actually, just open the case, remove battery, around 15 minutes, stick the battery again, plug device to PC......then my pc detected my device as MTK virtual com, then download firmware into device, finish....then FIXED it 
(2013-09-18, 18:07)akwangwu Wrote: [ -> ]today I used spf tool and when do firmware upgrade (original firmware file like as usual which I used) suddenly stuck then my device is recognized as "unknown device", it won't turn it on again, every time connects to computer, it will show as "unknown device", does anyone here has the same experience and success to fix it?
Thanks in advanced