In an era where smartphones are constantly within arm’s reach, public awareness around cell phone radiation exposure continues to grow. One of the most significant steps toward transparency came from the city of Berkeley, California, through its landmark “Right to Know” ordinance—a local law designed to inform consumers about radiofrequency (RF) radiation exposure.
After years of legal challenges, the ordinance was upheld by the U.S. Court of Appeals for the Ninth Circuit, marking an important moment in consumer awareness and public safety.
What Is Berkeley’s “Right to Know” Ordinance?
First enacted in 2015, Berkeley’s ordinance requires cell phone retailers to provide customers with a clear notice explaining that carrying a phone close to the body—such as in a pocket or bra—may cause RF radiation exposure to exceed federal guidelines.
The goal of the ordinance is not to restrict smartphone use, but to ensure that consumers are informed about proper usage distances already outlined by manufacturers and the Federal Communications Commission (FCC).
Why the Ordinance Was Challenged
CTIA, a major wireless industry trade association, challenged the law, arguing that it violated the First Amendment by compelling retailers to deliver a message they believed could alarm consumers.
CTIA claimed that:
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The warning overstated potential health risks
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The disclosure could create unnecessary fear
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Federal regulations already governed RF exposure standards
What the Court Decided
In a split decision, the Ninth Circuit ruled in favor of the City of Berkeley, stating that the required disclosure is:
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Factually accurate
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Consistent with FCC guidelines
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Purely informational, not misleading
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Permissible under constitutional standards
Judge William Fletcher noted that the ordinance simply communicates safety information already provided by phone manufacturers. Judge Morgan Christen concurred, emphasizing that the disclosure promotes consumer awareness rather than fear.
One dissenting judge expressed concern that the language could be misinterpreted, but the majority upheld the ordinance as lawful.
Why RF Radiation Awareness Matters
Radiofrequency radiation is emitted by all wireless devices when they are connected to a network—even when not actively in use. While regulatory agencies maintain that phones are safe when used as directed, distance from the body plays a critical role in exposure levels.
Research has shown that:
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Children may absorb RF radiation differently due to developing tissues
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Prolonged close-contact exposure can increase absorption levels
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Many users carry phones directly against the body, contrary to manufacturer guidance
Berkeley’s ordinance simply reinforces the importance of understanding these factors.
A Shift in the Conversation
Historically, RF radiation concerns focused primarily on thermal effects, such as tissue heating. However, large-scale government-funded animal studies have since explored broader biological impacts, prompting renewed discussion among scientists and regulators.
While research continues and conclusions evolve, transparency and informed use remain essential.
What Consumers Can Do Today
Regardless of regulation, individuals can take practical steps to reduce unnecessary RF exposure:
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Avoid carrying phones directly against the body
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Use hands-free or speaker mode when possible
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Maintain distance during extended use
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Follow manufacturer usage guidelines
Another increasingly popular option is using radiation-blocking phone cases designed to reduce exposure during everyday use.
The PHONTRA™ Approach to Protection
At PHONTRA™, we believe awareness should be paired with practical, science-backed solutions. Our radiation-blocking phone cases are engineered with independently tested shielding technology designed to help reduce RF exposure during normal use—without disrupting connectivity or convenience.
Public awareness initiatives like Berkeley’s “Right to Know” ordinance highlight an important truth: informed choices empower safer technology use.
Final Thoughts
Berkeley’s ordinance represents a meaningful step toward consumer transparency in the digital age. While smartphones remain indispensable tools, understanding how they interact with our bodies allows us to use them more responsibly.
At PHONTRA™, we support education, balance, and innovation—helping users stay connected while staying informed.
