Hi thedead1440, Honestly I don't know what is the correct way. Anyway I tried your suggestion but failed. What should I do? C:\Program Files\Nokia\Flasher>flasher -f -F main.bin -F emmc.bin --no-preserve flasher 3.12.1 (Oct 6 2011) Harmattan Warning: --no-preserve is not recommended, instead use erase commands WARNING: This tool is intended for professional use only. Using it may result in permanently damaging your device or losing the warranty. Ping attempt 1 (250 ms) Server application: 1.7.2 Found product RM-696 rev. 1603 Server implements softupd protocol version 1.8 Image SW version DFL61_HARMATTAN_40.2012.21-3_PR_006 Image moslo not present Image tar skipped Image config skipped Battery level 90 %, continuing. image [state progress transfer flash speed] --------------------------------------------------------------------- [x] cert-sw [finished 100 % 1 / 1 kB NA ] [x] cmt-2nd [finished 100 % 95 / 95 kB NA ] [x] cmt-algo [finished 100 % 789 / 789 kB NA ] [_] cmt-mcusw [init 84 % 6050 / 6050 kB NA ] [x] xloader [finished 100 % 23 / 23 kB NA ] [x] secondary [finished 100 % 94 / 94 kB NA ] [x] kernel [finished 100 % 2714 / 2714 kB 1194 kB/s] [_] rootfs [init 0 % 20480 / 978983 kB NA ] [ ] mmc [pending 0 % 0 / 0 kB NA ] ERROR: SU_GET_UPDATE_STATUS_REQ terminated with error code 1: Unknown error image [state progress transfer flash speed] --------------------------------------------------------------------- [x] cert-sw [finished 100 % 1 / 1 kB NA ] [x] cmt-2nd [finished 100 % 95 / 95 kB NA ] [x] cmt-algo [finished 100 % 789 / 789 kB NA ] [x] cmt-mcusw [finished 100 % 6050 / 6050 kB 3087 kB/s] [x] xloader [finished 100 % 23 / 23 kB NA ] [x] secondary [finished 100 % 94 / 94 kB NA ] [x] kernel [finished 100 % 2714 / 2714 kB 1194 kB/s] [f] rootfs [init 0 % 21504 / 978983 kB NA ] [-] mmc [pending 0 % 0 / 0 kB NA ] Fetching error list: ======================================== Update content failed to verify against cert: SW certificate not updated bb5_rdc_cert_read failed bb5_rdc_cert_read failed bb5_rdc_cert_read failed bb5_rdc_cert_read failed bb5_rdc_cert_read failed mmc: sfdisk returned status 1 mmc: Could not exec 'tune2fs -L rootfs /tmp/sudmmc35Gf4L/internal0p2' mmc: Could not remove mount directory /tmp/sudmmc35Gf4L/mnt: No such file or dir ectory [Pipe 4] Finishing in error state with status 1 ======================================== ERROR: Failed to flash images