DigiTimes claims that there is a possibility that Apple could be announcing both the 4.7-inch model and 5.5-inch model separately. This is because they are worried about the competition between both devices, which is what happened with the iPhone 5s and iPhone 5c. Both devices were differently priced, but it seemed that the more premium iPhone 5s model took the lead, leaving the iPhone 5c pretty much forgotten.
While that is a possibility, previous rumors have suggested that the reason behind the different launch dates could be because the 5.5-inch model could be facing some manufacturing difficulties. This means that the handset might either launch in limited quantities, or it could be announced at a later date when more units have been made available.
This contradicts an earlier rumor that suggested that both the 4.7-inch and 5.5-inch models would be announced at the same time. We’re not sure if separate announcements would be a good idea. After all customers might be understandably upset if they wanted the larger one but had to settle for the smaller one because the larger one had not been announced yet, but take it with a grain of salt for now and check back with us later for the details.