So, I have a w850 with the WSOD-problem. Some people said using SEUS would solve the problem, so I tried that. Now I got CID53 and still the WSOD. :(

Apparently I need to use FAR+jdflasher, I've read some guides and know how to do. BUT, how do you backup GDFS in FAR?
It won't work in XS++, I just get a message saying "Sorry, your phone is NOT SUPPORTED".

Here's a log from XS++ trying to backup GDFS:

15:20:03| XS++ v3.1 (Darwin) Ready !
15:20:03| Executed on Microsoft Windows XP
15:20:40|
15:20:40| Attempting to open the interface...
15:20:40|
15:20:40| TURN OFF PHONE!
15:20:40| Hold 'C' button on phone and connect phone NOW.
15:20:40| You have 30 seconds...
15:20:40|
15:20:44| Baseband ID: 9900
15:20:44| Protocol Version: 3.1
15:20:44| Phone name detected!
15:20:44|
15:20:44| Profiling SEMC phone...
15:20:44| Platform: DB2020
15:20:44| OTP CID: 51
15:20:44| EROM CID: 53
15:20:44| EROM Color: Red
15:20:44| IMEI: 35536301xxxxxx
15:20:44| Phone ID: W850
15:20:44| Region: EUROPE_4
15:20:44| CDA: CDA102568/13 R5A
15:20:44| Firmware Version: R1KG001
15:20:44| EROM: R3A022
15:20:44| Ready for operation!
15:20:49| Sorry, your phone is NOT SUPPORTED
15:20:49| Error: Failed to send CSLoader!
15:20:49| FSX Shutdown!
15:20:51| Disconnected... Unplug the phone

What should I do? :/ Just flash in FAR without GDFS-backup?