Ariz. Rev. Stat. § 28-914
A. Unless a motor vehicle is parked or stopped pursuant to section 28-645, subsection A, paragraph 3 or section 28-851, a person may not operate a motor vehicle on a street or highway if the person does either of the following:
1. Physically holds or supports with any part of the person's body either of the following:
2. Writes, sends or reads any text-based communication, including a text message, instant message, email or internet data, on a portable wireless communication device or stand-alone electronic device. This paragraph does not apply to either of the following:
(b) The use of a portable wireless communication device or stand-alone device when used in a hands-free manner for:
C. This section does not apply to:
4. An operator who uses a portable wireless communication device either:
(b) That was permanently or temporarily affixed to the motor vehicle to relay information in the course of the operator's occupational duties between the operator and either:
D. Beginning January 1, 2021, a person who violates this section is subject to a civil penalty as follows:
E. The department shall post a sign at each point at which an interstate highway or United States highway enters into this state that informs an operator that both:
F. A peace officer who stops a motor vehicle for an alleged violation of this section may not:
I. For the purposes of this section:
1. "Portable wireless communication device":