Then the company better being paying/providing said cell to you. If a company requires something to be used, they need to provide it.

They won't ever admit it. It's like if you were hiring someone: most people won't hire someone who doesn't have a phone number because that would be an inconvenience to them, but they can always make up another excuse for why not to hire the person.

Fortunately in my line of work it's not that uncommon to have anything other than a burner phone and even then a lot of people don't even have that. I went completely without one for about 2 years and then decided to get a burner when I had to walk back to my house to get some tools to fix an issue with my truck. Figured I at least needed one for those kind of situations.