Network operators could offer cheap data plans without allowing voice over them. Works for the Samsung S-Series tablets. Data is cheap, phone calls are disabled

Network operators could offer cheap data plans without allowing voice over them. Works for the Samsung S-Series tablets. Data is cheap, phone calls are disabled or charged separately. For some users (e.g. elderly) an iPad with its large screen would make a better phone. They don't walk around talking (anymore). Also when wearing headphones, there is no need to lift the phone to the ear. Same goes talking to the watch.