I'm trying to figure out what exactly happened?

IF she's a good understanding friend, one you can talk to freely, I'd come rite out & tell her you didn't get the "gist" of the cell phone changes, just couldn't understand what she was referring to. Ask her if there IS any problem with you taking her to the movies, & are you "still on" with the plans you've made. Tell her she knows she at least CAN be honest with you & you'll wait to hear back from her. Good luck, honey!^