Couldn't find anywhere FS file and .fbn file for my w850i

I couldn't find anywhere FS file and .fbn file for my w850i I have the main Firmware file. Do custom pack is necessary to flash the phone or optional? I couldn't find it either.

ChipID:9900,EMP protocol:0301
PHONE IS RED RETAIL PRODUCT
FLASH CID detected:52
Speed:921600
Flash ID check:897E
Flash props sent ok
OTP LOCKED:1 CID:49 PAF:1 IMEI:********* CERT:RED
FLASH CID:52 COLOR:RED

Model:W850i
Brand:Generic
MAPP CXC article: R1KG001 prgCXC1250200_GENERIC_CY
MAPP CXC version: R1KG001
Language Package:EUROPE_5
CDA article: CDA102568/1
CDA version: R2A
Default article: cxc1250489
Default version: R1KG001

Operator: 505-06

Elapsed:1 secs.

Hey animal i debranded an unlocked my w850i with these files

>>> W850_R1KG001_MAIN_GENERIC_CY_RED52 (MBN) file
>>>HB1-06_Gen_CDA102568_14_R5A_GENERIC_EUROPE_5 (custom file)
>>>W850_R1KG001_FS_EUROPE_5_RED52 (FBN file)

After flashing with these files i then made a vkp patch to unlock the phone from the main generic MBN file (above) using simlock patch generator.

If your phone is cid 49 then xs++ will update it to cid 52 do this first.

I used setool2lite v1.10 to apply all files and patch and all worked good.

All files can be found in download section . :a013

Top Sony - All about Sony Ericsson mobile phones. Free Firmware Download - Unlock - Upgrade - Debrand (for mbn and fbn files)
Top Sony - All about Sony Ericsson mobile phones. Free Firmware Download - Unlock - Upgrade - Debrand (for custom file)

Its cid 52. But what does HB1-06_Gen_CDA102568_14_R5A_GENERIC_EUROPE_5 mean here?

Ok that file i believe is the file that will debrand your phone from a network operator . europe 5 just means the available languages you can have ie italy france UK germany etc. Generic is just defining that your phone is free from one network operator.

the other files are just your latest main firmware and file system.

if you want other languages ( search this forum for lists of languages) then choose europe 2 or central europe or asia etc etc.... (make sure the fbn and custom files match languages.

I used the above files to debrand and unlock my w850i and it worked like a charm. I can use any sim card and i dont have any network software or icons , Free as a bird lol. any more help just ask and if i cant help mabee someone else here can as i am a noob.:a006