A se k800i cid red 49 phone came to me with configaration error. I try to customize this phone same version but this phone can`t customize. After that I try upgrade cid 49 to cid 52 with furious gold, upgrade ok. When I connect phone with usb cable with software of cruiser & cruise dongle a massage show lower box upgrade erom, after that I upgrade erom successfully with cruiser. At the end of process I press power button it show red blink. Seeing this red blink I fell deep frostetion what can I do for this, usally red blink occur for damage gdfs. I reconstration gdfs with suprem credit successfully, Credit lost. I hope phone will be ok but not. I try to patch unlock with cruiser connect phone press `c` with usb cable connect ok after flash fs file when press unlock rsa after a few second it sow lower box `gdfs startup fail` unlock rsa not completed. After that I decide to repair gdfs again . I repair gdfs again gdfs write successfully no credit lost but it not help me, phone dead, After that I dacide to repair sec erea rebuild and rebuild that successfully ok but it also can`t help me no credit lost. I repair gdfs again at this time credit lost . But phone is dead. I try to flash a1 java unlocker only flash selected but at the end of flash show gdfs related error , I try to flash with uc20 cable main, fs flash ok but phone dead, when I try to customize with uc20 cable lower box show gdfs service startup fail. But I unlock, repair gdfs, other se phone with se ultimate unlocker & s1 flasher unlocker without any problem