iPhone 6 is expected to have a dense LCD, A8 system on a chip, improved camera system and new sensors.
Apple's much anticipated iPhone 6 launch might be delayed due to production related issues, according to KGI Securities analyst Ming-Chi Kuo.
According to Kuo's research note, as cited by 9to5Mac, there are problems with the coloring of the metal casing and in-cell touch panel of the iPhone's 5.5-inch model.
The 4.7-inch version has also been facing similar issues but, due to the small size of the device, the issues are expected to be resolved easily.
It was reported that iPhone 6 was set to be launched in October 2014 but due to the technical difficulties the launch might be pushed to 2015.
Previously, it was reported that there were problems with the devices display and battery life. According to Kuo, the rumored scratch resistant 5.5 inch sapphire cover glass might not pass the drop test as well.
Kuo predicts that Apple might ship around 15-20 million units initially.