>Why would they be burning anything? They find you with the exploit and then use parallel construction to make arrests.

Same reason they don't burn 0days on low level drug dealers. The risk isn't that they have to reveal in court that they used some backdoor, it's that indiscriminate use of a backdoor eventually leads to it being discovered by security researchers.

>The location toggle does nothing to prevent your carrier (and by extension your government) from determining location from cell towers. If you trust there is no remote exploit, the minimum would at least include turning off cellular signals.

I specifically mentioned airplane mode in my previous post.