Apple has offered to repair a number of iPhone 6 Plus handsets after a fault has been discovered in a select number of devices.

The consumer tech giant has revealed a problem with the “iSight” functionality in the cameras for the oversized version of its latest flagship handset. One of the original differentiators for the 6 Plus   was its camera, which features a more sophisticated camera stabilising function compared to the iPhone 6. Apple didn’t specify the malfunctioning feature; however it did say that a limited number of devices will experience blurry photographs.

“Apple has determined that, in a small percentage of iPhone 6 Plus devices, the iSight camera has a component that may fail causing your photos to look blurry,” Apple said in a statement. “The affected units fall into a limited serial number range and were sold primarily between September 2014 and January 2015.”

Apple’s offering up a free replacement camera and repair if specific models are found to be faulty.

Meanwhile, Apple has also claimed the launch of its music service is seeing reasonable levels of customer retention, according to a report on ZDNet. Eddy Cue, Apple’s head of internet software and services, said 11 million users have signed up to Apple Music so far, with roughly 2 million of  those being signed up to family bundles for $15 per month.  An independent survey of 5,000 people   claimed Apple Music has experienced a churn rate of 48%, a number disputed by Apple, which said that number is exaggerated.

“Seventy-nine percent of people who signed up for a trial are using the service,” said an Apple spokesperson.

While Apple is targeting 100 million active users of Apple Music, it will still face fierce competition from Spotify, which currently serves over 75 million users, of which 25 million pay premium rates, in 58 markets worldwide.