I know Teams doesn't live on the intranet, but I'm not going to put work software on my own phone. Policy needs it to set up a work profile and I then can't use fingerprint, face or a 4 digit pin. And all the shite that flows through Teams would be be piling up, just like it does on the PC at work, brilliant when you're only in a couple of days a week. They want me to use a phone? Provide one.

The WhatsApp group is for us to send updates about traffic, if someone can cover a shift etc. it's not an official work thing. I could of course not use it and just text people. That's really just making my life difficult whilst sat up here on my high horse with a self righteous look on my face, whilst I miss the chance of an extra shift.

Really depends a lot on the groupchat. I was apprehensive but it's quiet there and overall the things that get sent there are either in office hours (e.g. "internet might be out intermittently we are working on a fix") to links to pay for something someone paid for outside of work like food or drinks.

I don't mind it that way, maybe once a week a couple messages

That requires a business login on your personal device, which is typically against company policy.

Although, so should be sharing work info outside of corporate channels, so what do I know.