The move is seen as a measure against a number of Android phones from manufacturers like HTC and Samsung will introduce a low-end 4 iPhone within weeks, with a new iPhone in May, released in September.
Apple Mac Blog 9-5 said Apple would release two iPhones in September, however, some sources are the repository of the launch of a new iPhone model 4S
Apple has not confirmed that iPhone will be a 5, however, much less one - or two - will be released in September. However, Apple almost never pre-announce anything and the time their product releases rolling is usually possible to reconstruct what will be released based on rumors in the UK Daily Telegraph, said recently.
It is believed that the iPhone 5 will have a faster processor - the same as A5 model is in the iPhone 2 - and a better camera, possibly with an 8 megapixel sensor instead of 5 megapixels which is on the iPhone 4.