it flashes 5 blocks which make the w550i phone to read and write by Farmanager plugins "sefp",so I'd told you that you need ‘w810_p3k_dcu.49r.ssw’ file.Click [Add] button on SETool 2 Lite select the file according to your phone model, in my case, ‘w550_r2e_dcu.49r.ssw’ (for W550i CID49) .
I've read on other threats that I have to apply to my phone only firmware with the same erom cid as is on the phone,in my case cid 50.
using "rest" files restore the main firmware.if you don't use "rest" files you can't switch on your phone.
aboutyou're right.If I apply w810_p3k_dcu.49R.ssw which has cid 49, the phone won't be damaged?