CTIA is no longer holding its conventions in the city by the bay because it had a law that required cell phone sellers to post signs warning of the risks of the phone's radiation. San Francisco will not enforce radiation cell phone warning signs after a lawsuit was filed by CTIA.
The San Francisco Board of Supervisors voted to accept a permanent injunction against the right-to-know cell phone law that would warn buyers of cell phones that could cause cancer. CTIA proposed that warning placards would "confuse" consumers. 
CTIA is made up of major cell phone carriers and makers including Verizon, AT&T, Samsung and Apple.
The city gave up the fight because if the city lost, it could have been fined $500,000 in attorneys' fees. The FCC claims that cell phones are consider safe. Last month the FCC agreed to reconsider its ruled that have been around for 17 years.