don't mess with your GDFS, if it is damaged your phone won't turn on at all, try to flash it again using this
MAIN: W810_R4EA031_MAIN_GENERIC_HN_RED49
FS: for your country and matching Custom Files. then see if it is working and then create the patch for this MAIN and apply it.
PS: matching FS version for R4EA031 main is R4ED001.