Update: A report on Apple blog One More Thing has put out a picture of the supposed 4-inch screen device next to an older iPhone 5. The post says the phone could be called iPhone 6c, although the name can get changed.
In the picture, the new 4-inch iPhone follows the design of the iPhone 6 and iPhone 6s series with more rounded volume buttons on the side. Check out the full size picture here.
Apple will launch an updated version of the iPhone 5s called iPhone 5se (SE stands for special edition), says a new report on 9to5Mac.
The report also claims that the 4-inch iPhone 6c rumours were fake, and based on its sources, Apple is launching an updated version of the iPhone 5s with a design similar to iPhone 6 and iPhone 6s series.
9to5Mac adds that while the rear and front camera will remain the same as the original iPhone 5s, it will have a new NFC chip for Apple Pay and barometer for tracking elevation in the Health app. The processor will be the A8 from Apple iPhone 6.