Different SIM for Blackberry?

Does Blackberry smartphone use a different SIM card (64k) vs other phones? A friend told me this is true.

I'm using the same sim card I used for my iPhone and Samsung.. and Nokia.. so I don't think so.

Not that I know of, sometimes I switch my SIM card over to my rzr if im going to the beach and dont want to bring the BB so id say no

I used the same SIM in 3 phones, including my 8320, so, I am also doubtful.

Sim cards are the same except for like on att having a 2G compared to a 3G, but that really doesnt matter unless you have a 3G sim card

Att and tmo have the same size Sim card. Which is why you hear of tmo customers using iphones. But there is a 2g and 3g difference.
~via BB (wap.rabroad.com)~

i have used the 3g sim card from att on unlocked non 3g blackberrys from tmobile. there is no difference.

well no difference using a 3g card in a non 3g phone, now on the other hand using a 2g card in a 3g phone may not work

going to check this myself with my cousins 3g sim