The US authorities are investigating Apple over possible breaches of stock market rules relating to its software update to address the slowing iPhone battery debacle.
Both the Department of Justice and the Securities Exchange Commission are reported to be studying Apple´s disclosures on the issue.
Apple has admitted to slowing iPhones with ageing batteries, though has claimed the practice was done to “prolong the life” of the devices.
However, many customers suspect Apple wanted to entice those with older smartphones to upgrade.
The latest probe is to focus on whether Apple properly followed disclosure rules in the way it responded to public angst over the issue.