It's just a shame there is no actual proof of Apples data integrity in the public domain, because the code is not open source and and cant be analysed. We only have Apples word that no personal data is streamed - I don't trust that word any more than I trust Amazon or Google, because like their rivals Apple have been caught out fibbing in the past. If you want to trust their word, then be my guest, but until the code is opened for people to examine I don't believe a chuffing word any of them say. That's why I have a dumb phone.
Your position can still be identified through cell tower triangulation, so best remove the battery well before arriving at the site or dumping the bodies.
Apple love their encryption and are as transparent as a lead wall (lined with more lead)
However, you can jailbreak an unlocked Apple device, and with an infosec community that is very large and proactive and with big companies constantly one-upping each other with bug bounties and such, I'd expect someone to have found something damning.
(Though Apple are very clever and I suspect they have a means of disabling certain features in jailbroken devices in much the same way that VW diesel engines have defeat devices)
