Apple has launched a free repair programme for iPhone 8 units that were sold between September 2017 and March 2018 with a manufacturing defect in the logic board, which has been causing unexpected restarts, frozen screens and issues with the device turning on.

The logic board is the main circuit board consisting of the central processing unit (CPU), main system memory and circuitry that controls the disk drive, keyboard, monitor and peripherals.

"Apple has determined that a very small percentage of iPhone 8 devices contain logic boards with a manufacturing defect. Affected units were sold in Australia, China, Hong Kong, India, Japan, Macau, New Zealand and the US, and if your iPhone 8 has an eligible serial number, Apple will repair it free of charge," the iPhone maker wrote in a post on the website on Friday.

The free programme covers iPhone 8 units sold up to three years after the first retail sale of the device in September 2017.

The company recommends that before submitting the device users should fix their hardware like broken screens, as well as update iCloud and iTunes, as the programme does not cover these.

"Your iPhone will be examined prior to any service to verify that it is eligible for this programme," the post added.

The Cupertino, California based company also stated that this programme does not extend the standard warranty coverage of the iPhone 8.

New iPhones may well be amazing but will Apple follow a new strategy in India? We discussed this on Orbital, our weekly technology podcast, which you can subscribe to via Apple Podcasts or RSS, download the episode, or just hit the play button below.