I'd say it's feasible. Practical? Probably not. I'd imagine it would be like a very linear, horribly written story:

    * John goes to the store and meets a woman named Jane.
    * Wait, actually her name is Alice and she works at the store.
    * John tells Alice that he is looking for a widget.
    * Alice looks for the widget and shows John a list of what she found. 
    * John can't read the list.
    * John takes a photo of the list and sends it to his friend Jane.
    * Jane reads the list and texts what she thinks it says back to John.
    * John promises to get back to Alice once he can read the list. 
    * John gets Jane's SMS. John can't read Jane's SMS.
    * John throws his hands in the air.