So what is the objection to an iPhone as compared to any other brand?
Cost? Internet access (then the objection is to internet access, not to any specific hardware – a netbook or tablet is just as problematic)?
I can see reasons to object to portable phones, or to computers, but why a specific brand? If a hot dog is treff because its made of pork, it’s still treff if instead it’s an expensive pork roast.