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That's the whole point of work profiles and company owned devices. This Joelle just has no idea what she's talking about.

You literally can't "just install an MDM" to your phone in the way that allows a company complete access to your device. Both iOS and Android require that either the device is new or the device is factory reset. Then and only then can the device have MDM enabled as a "Company Owned Device" e.g. complete access.

The other way, is through "Work Profiles", it's an isolated and sandboxed partition. The "Work side" has no access to anything on the personal side and the personal side has no access to anything on the work side. On Android the work side has its own Play Store, its own Chrome, its own apps. (In fact, if you're rooted you can hijack the work profiles feature for yourself if you want to install apps you'd rather keep isolated, like TikTok).

If I issue a wipe command to a phone with a work profile, only the work profile gets wiped and the personal side is untouched. An employer utilizing work profiles only has visibility and control within the work profile, the rest of the phone might as well not exist

Hell, Android even gives you the ability to restrict the Work Profiles to work hours so all the work apps go dormant after 5