When I have worked for similar companies, I simply didn't install any of their software on my phone. If they wanted the ability to wipe it, they would have to give me a phone for it. Sure enough, it never turned out to be that important to anyone.

Yeah, I wouldn't trust company MDM on a personal device at all. Best case is that someone with an itchy trigger finger wipes your phone. Worst case you've got someone deciding to poke around your personal device for shits and giggles.

Ironically, a week before I left one of these companies, they remotely wiped my work laptop. Someone got the memo wrong, and I spent the better part of my remaining time with them trying to get access to all the various systems so I could complete one bug ticket. I hate to imagine what would have happened if I had given them access to my personal phone.

Is it an Android? How does that work? Is it a special permission or something?

I've allowed Slack on my personal phone. It has no permissions according to the Android OS (beyond permission to use the network, which, of course, can't be denied least Google lose ad revenue). I don't think it can wipe my phone. I hope it can't wipe my phone?

MDM is kind of a super admin feature on Android and iOS which allows for all kinds of things normal apps can never access. It's used by companies to manage company owned devices so they can do things like reset the password and remove the apple id lock when an employee leaves.

It's not that slack can wipe your phone, but that (it sounds like) slack can detect the presence of the company MDM setup which can wipe your phone and lock you out of the app if it is not detected.

I didn't install it. After 5/6 I'm done with work. I don't use work devices for personal use/vice versa.