My son just came back from a High School trip. I purchased the Memory Maker from him. He did not have a magic band.
Some ride photos were on there. Some weren't. He got all of them because when he came home he told me what ones were missing and I called. Calling was a easy process. Just know what day, approximate time and what was being worn.
I believe you can use your phone as "the card" for Memory Maker. For those rides that have a scanner at the end, you just scan your phone. For those that do not, I believe that I read that if you BLUETOOTH is on, then it should pick up.