3.5mm would be easier than USB generally

But I can't start a business selling phones because the authorities will make me pay them to bomb kids if I'm successful - or if I move somewhere they can't make me pay them, they'll just kill me instead

Americans haven't had the backbone to stop our fellow countrymen from bombing kids, we haven't even had the backbone to stop them from forcing us to pay taxes, we haven't even had the backbone to demand devices that don't spy on us so much the people who are allowed to make all the phones they want and avoid taxes

Graphene is better than nothing - but the main benefit of it is just making parallel construction harder. I think the phone still reports everything you do, but sometimes that info can't be released or used in a courtroom because it would draw too much attention to how there was no way to get that info without the phone spying