iPhone 8: Some handsets can unexpectedly stop working, Apple warns, as it offers free replacements to users

A problem with the logic board that powers the phone could make it shut down, freeze or not turn on

A customer inspects the new Apple iPhone 8 at an Apple Store on September 22, 2017 in San Francisco, California (Justin Sullivan/Getty Images)

Some iPhones can shut down, freeze or refuse to turn on, Apple has said.

The problem is the result of an issue with some of the logic boards that are included inside the iPhone 8.

If you own one of the affected devices, it could stop working and the defective component should be replaced, the company has warned.

Helpfully, it is offering a free replacement programme to do exactly that.

The affected phones were all sold in Australia, China, Hong Kong, India, Japan, Macau, New Zealand, and the US, between September 2017 and March 2018. The manufacturing defect is only found in a "very small percentage of iPhone 8 devices", Apple said.

"Affected devices may experience unexpected restarts, a frozen screen, or won't turn on," it writes on a special page devoted to the issue. "Apple will repair eligible devices, free of charge."

Finding out if your phone is one of those affected is relatively easy. Just find the serial number – most easily located by heading to the Settings app on the phone – and type that into the special tool on Apple's website.

If it is one of the affected devices, it will need to be sent to Apple to be repaired. That can be done either through an authorised Apple repair centre, in one of its shops, or by contacting its support service who will arrange for it to be mailed.

The programme will be in place for three years after the phone was first purchased.