California’s rules are strict when it comes to using a wireless or mobile phone while driving. These laws are designed to reduce distracted driving and keep roads safer.

Key Legal Requirements

• Drivers may not use a handheld wireless telephone while driving except if the device allows hands free talking. California Vehicle Code section 23123 prohibits holding or using a phone unless it is designed for hands free use.
• A separate law bans texting or using handheld electronic wireless devices to write, send, or read text based communications while driving.
• Drivers under 18 years old cannot use a wireless telephone in any way while driving, even hands free.

What Changed Most Recently

• In 2025 the state courts clarified that holding a phone for virtually any reason while driving is illegal. Even brief use, such as looking at a map while holding it, is now expressly forbidden.
• The law requires phones to be mounted if being used for navigation or other functions and allows only minimal interaction, such as a single tap or swipe, under hands free or device mounted conditions.

Penalties and Exceptions

• Violating these laws may result in fines. The first offense typically carries a base fine though additional fees and assessments usually increase the total penalty.
• Emergency personnel such as police, fire, and medical responders acting in the course of their duties are generally exempt from these restrictions.

Hillstone Law can help drivers understand their rights and responsibilities under California’s distracted driving laws and assist if you are involved in an accident related to cell phone use.