It affected the iPhone 6, iPhone 6 Plus, iPhone 6S, iPhone 6S Plus and iPhone SE. Apple later rolled out the same update for iPhone 7 and iPhone 7 Plus devices. "We now believe that another contributor to these user experiences is the continued chemical aging of the batteries in older iPhone 6 and iPhone 6s devices," said the company. To switch out a battery on an iPhone, you have to go to an Apple retailer or ship your phone to Apple. Upgrading to a new battery will clear up any slowdowns related to the update, said Apple.

Source: CNN December 29, 2017 00:00 UTC