According to DigiTimes, Cupertino will face problems with the mass supply of the next iPhone because of the lack of enough chips for the fingerprint sensor.
Component production was set to start between late June and early July but now it is reported that it may begin at the end of this month.
The difficulties are related to fingerprint scanner chips that manage the enrgy of the LCD display.
The delay could reportedly push back around 3 million shipments of the handset to the fourth quarter of the year.
The integration of a fingerprint scanner in the iPhone 5S is an innovative feature that will differentiate the device from its predecessor.