What is different in WI and SM firmware?

I am looking at reflashing a K800 to K810 with R8BF003. I have found

K810_R8BF003_MAIN_GENERIC_SM_RED53
K810_R8BF003_MAIN_GENERIC_WI_RED53
K810_R8BF003_FS_TELEF_GEN_RED53

My question is...what is the difference between SM and WI versions? What do SM and WI mean?

P.S. I know that I also need the K800 light effects.

Thanks
Darren

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what is the difference between SM and WI versions

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SM = K810, and WI = K800 phone. So, the K810_R8BF003_MAIN_GENERIC_SM_RED53 can be whatever firmware... Better do not use it!!!

And do not forget the custom pack.

Thanks. I took the plunge and installed the _SM version as that was on the TopSony downloads area for K810. Yes I did the custom pack (CDAxxxxxx - I can't remember the number - I am at work) and then I also did the K800 light effects. The K800 now says K810, I have TrackID and applied a few patches. Unless something goes horribly wrong I will stick to the _SM version.

Darren