Softbank Mobile Corp. said Wednesday it plans to change the content of its advertisements, possibly by this weekend, in response to an investigation by the Fair Trade Commission into whether the firm's "zero-yen" campaign was misleading.
"We may have sent messages to customers that were too sensational," company spokesman Fumihiro Ito said.
In a bid to catch up with other carriers, the unit of Internet services firm Softbank Corp. made advertisements that tout free calls and e-mail between Softbank mobile subscribers.