Apple and Samsung have been fined millions of pounds for deliberately slowing down their smartphones.
The former was fined €10m (£8.85m) and the latter €5m (£4.43m) in Italy.
The country’s competition authority found that official software updates harmed the performance of their devices.
It followed accusations that the phone-makers were deliberately slowing down their older devices in order to cajole customers into upgrading to newer models.
Apple and Samsung “implemented dishonest commercial practices”, according to the watchdog.
The updates “caused serious malfunctions and significantly reduced performance, thus accelerating phones’ substitution.”
iPhone 6 users ran into problems after downloading a version of iOS optimised for the iPhone 7.
Samsung users had similar issues with the Galaxy Note 4 after downloading the operating system for the more recent Galaxy Note 7.
Last year, Apple admitted it had been slowing down its older phones, but claimed it only did to avoid sudden shutdown problems. It denied it was trying to curtail any products’ lifespans.
As a gesture of goodwill, it reduced the price of replacing an iPhone battery to £25. Though this offer ends at the end of this year.
Keen to take advantage of Apple's £25 battery replacement offer? Here's what you need to know.
Samsung intends to appeal the fine, while Apple declined to comment.