Years ago, I worked in the IT department at a university that brought in an MDM for accessing work email on personal devices with a policy of wiping the phone if you got your unlock code wrong 3 times. I refused to use it on my personal device and told the head of the department that it was far too risky as you could accidentally do this with the phone in your pocket. He disagreed, but less than a week later, this exact thing happened to him, got his unlock wrong 3 times, phone wiped, no backup done. He still refused to change the policy even with the inconvenience it caused him. I just laughed.

"you're welcome to try"

hands over my brain-dead flip phone with no 'app' capability

I used to have Teams and Outlook on my phone, so I was accessible for work at almost any time. I know a lot of people think that's dumb, but I was an hourly employee so I never minded the occasional work ping after hours, since I didn't mind getting paid to reply with a few sentences from my couch. It worked out well for both me and my company.

Then they decided to make MDM mandatory on your phone to access Teams and Outlook. I declined the install and removed both apps from my phone. Now I can easily miss IMs for weeks at a time if I don't open a 2nd laptop to check them. I'm more disconnected than I've ever been, which is probably better for my mental health. I don't bill as much as I used to, but that's fine for me.

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

I’m not sure what MDM you’re subjected to but I’ve been an MDM engineer for 7 years using Intune and JAMF and no, no SMS or phone records. Even the phone # is blanked out minus the last 4 digits. Yes we can wipe the devices if it’s lost\compromised but personal versus corporate owned devices are limited. I can’t see what apps you have that were personally installed. And the only info I can get are the device stats (SN, IMEI, storage, battery, memory, etc).

Can you support your claims? I’ve worked with Intune, Jamf, MaaS360, Citrix, and Workspace ONE and none of them could read texts, emails or browser history.

I’d be very interested to learn more about how they can access this information through MDM. We always did it through either the mobile carrier or the admin console for whatever the office/mail suite that was deployed.

Please cite any one of your sources. I've managed MDM for over a decade and you're spreading misinformation.

Absolutely none of the MDM products on the market allow for the reading of personal e-mail, SMS, phone records, etc. On the contrary, almost every single one provides an information screen during the enrollment that makes it abundantly clear that they do not (and can not) access that data. Moreover, the "wipe" of data is the removal of company data. It doesn't wipe your phone, it just removes the work profile (Android) or deprovisions the work profile and associated apps (Apple). All of your non-work-related data is untouched.

Quick Sources for Intune and JAMF -- do your own googling for others:
https://learn.microsoft.com/en-us/mem/intune/protect/privacy-data-collect
https://www.jamf.com/blog/apple-mobile-device-management-faq/

This depends on the configuration of the MDM and the MDM vendor. For example, most MDM deployments to Android for instance conform to Android For Work, which functions in practice to a virtual machine from a user's perspective, and doesn't have access to a non workspace content. iOS has a similar functionality which, while less commonly used, is there specifically for use on personal devices to sandbox off 'work' content where pervasive features like factory resets and access to phone logs and sms records don't function, and you can't access the more advanced features without having purchased the device via a corporate account.

SimpleMDM has a credit card-less trial which you could set up to see what features exist and how they work from the vendor side. You won't have access to some of the 'supervised' features without being a business,but you can see the buttons offered when you aren't a corporate-purchased device readily enough.

For corporate owned devices, the rules are very different though.

I have a little experience with Microsoft’s intune and there are different ways to register devices. Someone feel free to correct me because I don’t feel like logging in to double check. Company owned devices have more control and can restrict apps, lock, full wipe, etc. Personal or “bring your own” devices are much less restricted. I can’t lock, wipe, or restrict apps. For the personal devices, it’s more about giving secure access to the companies resources and not really controlling the device. I work for a small business and only use this to setup access to non important documents for employees in the field so I know just enough to be dangerous.

In fact, if you're rooted you can hijack work profiles for yourself if you want to install apps you'd rather keep isolated, like TikTok

You can use Shelter to enable this functionality without root.

https://f-droid.org/packages/net.typeblog.shelter/