Hello All,

I had just purchased a SE k550i recently, and i joined the best TopSony forums, as i had gone through all the threads within this forum.

I am eager to flash my k550i to w610i firmware.
however, i need to be able to rollback to my original state (that's k550i)
so, do i need to take a GDFS backup, or Firmware, or Main backup.

or only GDFS would suffice.

as i dont want to brick my new k550i, so please help me so i can take the correct steps, in terms of backing up the files.

please specify which one is most important.

Thanks in advance