I was able to patch my w810i using set2liteV1.11
I made a remove simlock patch using SIMLockPatchGen then followed the following instructions:-
How to apply patch if the phone is unbranded
Start setool2 lite 1.11
Select phone modell.
Tick bypass DB2020 security box. (THIS DID NOT APPLY)
Press the button add and browse for the MAIN F/W (.mbn) file.
Add patch In MISC files. (GENERATED BY SIMLockPatchGen)
Press flash and follow instruction in setool.
Took about 10 minutes.
Hope that helps!