At my company, you have to provide your own device, but the phone number/plan is either (a) paid for by the company, or (b) you get a $40/mo stipend for cell service.
It turns out that I can use our 2FA app without MDM, on my personal. And nowadays, I rarely use slack or email from mobile, and I don't get calls.
I am pretty strong in the "don't put company stuff on personal devices" camp. Even if they don't control your phone by policy, they do technically. They put root certs on the device, and though they can't see individual app data (depending on config) they can see a list of installed apps, and enforce certain baselines.
It turns out that I can use our 2FA app without MDM, on my personal. And nowadays, I rarely use slack or email from mobile, and I don't get calls.
I am pretty strong in the "don't put company stuff on personal devices" camp. Even if they don't control your phone by policy, they do technically. They put root certs on the device, and though they can't see individual app data (depending on config) they can see a list of installed apps, and enforce certain baselines.