Apple has issued an unprecedented apology over its handling of the admission it slows down older iPhones.
The firm said last week it 'throttles' phones to extend their life and stop them from shutting down as batteries age and become less effective, triggering lawsuits across the world.
In addition a South Korea's Communications Commission has reportedly asked for an explanation of the issue from Apple, while in France a consumer group has filed preliminary, legal complaints in court.
'We are hoping to get some answers on whether Apple intentionally restricted the performance of old iPhones and tried to hide this from customers,' the Korean Commission said.
Apple is already facing lawsuits in the United States over accusations of having defrauded iPhone users by slowing down devices without warning to compensate for poor battery performance.
Under French law, companies risk fines of up to 5 percent of their annual sales for deliberately shortening the life of their products to spur demand to replace them.
All the US lawsuits - filed in U.S. District Courts in California, New York and Illinois - seek class-action to represent potentially millions of iPhone owners nationwide.
One of the lawsuits, filed Thursday in San Francisco, said that 'the batteries' inability to handle the demand created by processor speeds' without the software patch was a defect.
'Rather than curing the battery defect by providing a free battery replacement for all affected iPhones, Apple sought to mask the battery defect,' according to the complaint.
The problem now seen is that users over the last year could have blamed an aging computer processor for app crashes and sluggish performance - and chose to buy a new phone - when the true cause may have been a weak battery that could have been replaced for a fraction of the cost, some of the lawsuits state.
'If it turns out that consumers would have replaced their battery instead of buying new iPhones had they known the true nature of Apple's upgrades, you might start to have a better case for some sort of misrepresentation or fraud,' said Rory Van Loo, a Boston University professor specializing in consumer technology law.
波士顿大学消费者科技法教授罗瑞·瓦·卢（Rory Van Loo）说：“假如消费者知道了苹果升级的内幕，消费者只会换电池，而不是购买新的iPhone。这已经能够以失实陈述或欺诈起诉了。”
Today it published a letter saying 'We know that some of you feel Apple has let you down', and revealed it is slashing the price of a replacement battery, and planning to show users exactly how much their battery has degraded.
'We apologize. There’s been a lot of misunderstanding about this issue, so we would like to clarify and let you know about some changes we’re making.'
'First and foremost, we have never — and would never — do anything to intentionally shorten the life of any Apple product, or degrade the user experience to drive customer upgrades,' Apple said.
'Our goal has always been to create products that our customers love, and making iPhones last as long as possible is an important part of that.'
Apple said it is reducing the price of an out-of-warranty iPhone battery replacement by $50 — from $79 to $29 — for anyone with an iPhone 6 or later whose battery needs to be replaced, starting in late January and available worldwide through December 2018.
Early in 2018, it will issue an iOS software update with new features that give users more visibility into the health of their iPhone’s battery, so they can see for themselves if its condition is affecting performance.