You need a jailbreaken device to do it but does it can it be rootless

[BuKeNiDeAo]

no

[preland]

@BuKeNiDeAo What is needed from the jailbroken phone that can't be obtained from a non-jailbroken phone? Does it have to run a specific function on the phone, or is it just data retrieval from somewhere on the phone?

Do keep in mind that there are ways to read and write* files from the root directory on rootless versions of iOS (such as using MDC, though writes don't persist after a reboot)