"This survey confirms what we already knew to be the case, that wireless consumers would benefit tremendously from the implementation of theft deterrent technology on all smartphones," San Francisco District Attorney George Gascon said. "Beyond the financial benefits to consumers, however, the human costs of not implementing this technology on all smartphones are simply too great."
Gascon has been at the head of efforts to mandate a kill switch.
The CTIA could not immediately be reached for comment.
According to data from law enforcement agencies, half of all robberies in San Francisco in 2013 targeted a smartphone. In New York it was 20 percent, a rise of 40 percent on 2012, and in London around 10,000 smartphones are stolen each month.
Martyn Williams covers mobile telecoms, Silicon Valley and general technology breaking news for The IDG News Service. Follow Martyn on Twitter at @martyn_williams. Martyn's e-mail address is email@example.com