Which behavior is discouraged while using a cell phone while driving?

Making frequent manual adjustments to a cell phone while driving is discouraged because it significantly distracts the driver from the road. Engaging physically with a device diverts attention away from essential driving tasks, such as monitoring traffic conditions and maintaining proper vehicle control. This behavior increases the risk of accidents, as the driver's focus is split between the road and manipulating the device.

In contrast, using a hands-free device is generally considered safer since it allows the driver to keep both hands on the wheel. Limiting conversation topics to driving can help maintain focus, and pulling over when necessary to make calls is a responsible approach that prioritizes safety. Consequently, the behavior of making frequent manual adjustments poses a greater danger while driving, highlighting the importance of minimizing distractions.