[prmoustache]

If they want to use an MDM solution like Microsoft Intune to enforce some security compliance they are kind of forced to provide the device. People typically don't accept their private phone to be managed by their company IT.

[ivanbakel]

Providing a device doesn't require picking a standard issue model of phone. IT departments often support an employee's choice of phone (or at least, choice of manufacturer) provided it's compatible with management software.

[cicko]

... from a given set of options.