I had an e-mail from our Nextel dealer rep and was told that you can use any falcon sim card in the i860. I had a customer that had one of the i205's. He upgraded to the i860 and took his sim out of his 205 and is using it in his 860. Customer care said his phone wouldn't even work. Nope, everything worked. He even sent pictures with it. So that is what led me to believe that any 64k Sim card will work.

My dealer rep at first agreed with customer care. Then he did some research and came out and said any 64k sim card will work in the 860.

How can you tell if it has MMS or not?