Kim - last year at Mala Mala they would not allow cell phones and specifically cell phone photography on game drives. They do this because evidently people uploading photos to Facebook, etc. has enabled poachers to locate rhinos based on location info embedded in the photos.
I wanted to take some iPhone shots of acacia trees, etc - I said I would turn off location data and not take any animal photos, but they still said no. I don't know about in the public areas - I am pretty sure that I took some lodge photos without any issues.