Yes i managed to unlock it seemed really simple with that walkthrough although it missed out bypas db2020 secrurity.
Operation failed was happening before i unlocked it... its the reason i flashed in the first place and locked my phone back to 3 because the shop where i had it unlocked clearly only did a patch unlock like what i just did yesterday.
how do i flash all of that i flashed the phone along with the unlock patch didnt i? but i still have all my phones files eg.. themes ringtones,texts,contacts .. the only thing that went after the flash was my call list.