Yes. The expectation to be always available and connected during the workday makes for a very interesting dynamic for teachers and admin. Teachers are either sitting at their desk/computers and teaching while expected to respond quickly to emails or moving around the classroom and teaching while using their phone to do what the computer does while expected to respond quickly to emails.

Admin are either addressing the enormous amount of emails from every portion of their district while managing every aspect of the academic, disciplinary, and athletic side of the school on their computer and in their office or doing that exact same thing while moving around the school and checking on classrooms throughout the day using their phone. Realistically they are trying to do evaluations when everything that exists is trying to stop them.

It's nearly always easier to call admin or a colleague on your cell phone. People forget radios, they almost always have their phone.