NEW YORK -- Cell phone companies pledged Monday to warn subscribers before they go over their monthly limits for calling minutes, text messages and data use.
The pledge comes in response to a threat of regulation by the Federal Communications Commission, which wants to curb nasty surprises in the monthly bills of wireless subscribers.
CTIA - The Wireless Association, a trade group representing the major cell phone companies, said they're also promising to warn subscribers that they're paying roaming fees if they travel abroad.
The warnings will arrive as text messages, and subscribers won't need to sign up for them - they'll arrive automatically. CTIA said its member will have warnings in place on at least half their plans in a year and all of them in two years.
AT&T Inc. and Verizon Wireless, the two largest carriers, already provide text-message warnings on their data plans, but not on text messaging or calls. Instead, subscribers have to look up their usage data.
The announcement was made jointly by the CTIA and the FCC, which credited Consumer's Union, the publisher of Consumer Report, for raising awareness of the issue. The magazine had found that many of its subscribers had been startled by high monthly bills.
Curbing occasional high bills is unlikely to have much of a financial effect at phone companies. Analyst Michael McCormack at Nomura Securities noted that the companies say that only a few percent of their subscribers exceed their allotments in a month. The trend over the past few years of making calls to other cell phones "free," or not counting toward the plan limits, has reduced the number of people who go over on calling minutes, he said.
Phone companies are also moving away from charging for each text message or selling "buckets" of 500 messages per month. Rather, they have moved toward offering unlimited text messaging.
The biggest remaining "bill shock" problem for consumers may be in international data roaming, McCormack said. Someone who travels abroad with a smartphone might use it sparingly for calls, but be unaware that apps are using data in the background, racking up big fees that only become apparent when the bill arrives.
The alerts are voluntary for the phone companies, but FCC Chairman Julius Genachowski made it clear that the agency would step in if companies fail to police themselves.
Kathleen Grillo, senior vice president for federal regulatory affairs at Verizon Communication Inc., said the voluntary approach was preferable because things change quickly in the wireless world and regulations don't always keep up.
"The result is an industry code that will serve consumers better than rules that would soon be outdated," she said.
Asked at the press conference why it would take two years to fully implement the warnings, CTIA President Steve Largent said phone companies have to reconfigure their systems.
By PETER SVENSSON AP Technology Writer