is R4i (Revolution) compatible with 1.3U firmware ?

I need some help to find answer these 2 questions.

1. is R4i (Revolution) compatible with 1.3U firmware ?

2. how can I understand if the R4i unit is FAKE ?

I made a huge research but I got some different answers, the I decided to ask in here. I can guess that these "is it compatible ?" questions are asked a lot and "boring" stuff. But I would be happy if you guys can answer this question one more time for me. Actually I am confused because I made more than needed research >.<

I have seen this R4i revolution in a game shop in Canada, they are asking for ~60 CAD + tax :( and that is my best bet because I don't have the option to buy online.

At least, I want to be sure that they are selling a genuine R4i and I want to be sure if that card will work with my updated 1.3U DSi system.

thank you.
M.Can

dose the dsi have firmware like the psp?

yes it does.

mine came as 1.2U and I brilliantly updated it to 1.3U (U refers to USA I think)

it's hard to find such kind of stuff in Toronto / Canada.

there is no honest seller, they try to rip you by asking ~ $60 for a $15 product.

almost none of the sellers has any stores and they request you to call them before visiting and they meet you at gas stations !!!

I would be so happy if someone actually knows a store in Toronto where I can go and buy a nice DSi card without ordering online.

thank you.

well I sell the R4i Sdhc they work great it is compatible with the new update I even tried to update my dsi to see if there was a new version and nope all the R4isdhc that i test work perfect the only thing i havent figured out is how to get emulators on them
Im from Cali