What action is considered illegal regarding phone usage while driving in Arizona?

Texting while driving is illegal in Arizona because it significantly increases the risk of accidents by diverting a driver's attention from the road. When a driver texts, they are often distracted from their surroundings, which may lead to slower reaction times and impaired decision-making. This law aims to enhance road safety by preventing distractions that can cause serious collisions.

The other actions, such as using a hands-free device to take a call, using GPS navigation, or listening to music via phone, are not inherently illegal in Arizona. These activities can generally be completed without taking your hands off the wheel or eyes off the road if done properly. Therefore, the law specifically targets texting to address the high level of risk it presents.