As you wrote in your first post, you must use this fs file: W850_R1ED001_FS_EUROPE_2_RED49.fbn..
NB...Check that your phone is CID 49 first..
Remember to choose customization according to this file..
About your unlock wish...If your phone is CID 49 or 51, you can use a pay service to get it unlocked...5-6€..
If your phone is CID 52, you either have to pay 50€ to get it DaVinci unlocked, or let a unlocker with U-Box fix it for you..