I know there's irony is asking how to disable the phone capability on a phone but I find that voice calls coming from standard POTS are 99% spam and just an annoyance. Everyone I know or do business with has moved on to other forms of communication (even for voice). Is there a way to disable all phone calls? I don't want to kill cellular altogether as I still want cellular data and text but I don't want any more phone call capability on my iPhone. Any ideas? Thanks!