Following consumers' complains about abnormal green lines appearing on the edges of the latest iPhone X, Apple is reportedly offering to exchange the faulty phones for new ones.

The company has not officially responded about fixing the problem yet, which could mean that the problem may not be corrected through a software update. It is also not clear how many iPhone X devices have this problem.

A similar problem was found last year when Samsung Electronics released the Galaxy S7 smartphones that also used Samsung Display AMOLED screens. At the time, some Galaxy phones showed pink lines on their screens.

The iPhone X is first of the Apple phone to use organic light-emitting displays. The problem could be either due to the quality of the active-matrix organic light-emitting diode (AMOLED) screens exclusively supplied by Samsung Display, or Apple's poor adoption and manufacturing of the phones.

There have been reports that the delayed launch of the iPhone X was the "poorer-than-expected" quality of Samsung's Super AMOLED panels. But if substandard panels were supplied, those products would have been detected during the inspection procedures.

According to other sources, the yields rate of iPhone X smartphones was low due to the iPhone maker's inexperience with OLED panels.

Despite the supply contract with Apple, Samsung Display's sales ratio of its OLED business division has declined to about 60 percent of its total sales at 8.28 trillion won ($7.39 billion) in the third quarter of this year. It was also less than half of the OLED sales in 2015. The decline could be attributed to either a "penalty" Samsung Display had faced due to not satisfactory OLED output / quality, or to a cutt off in the supply volume.

Apple has not yet commented on the issue.