Apple iPhone 6S
The iPhone 6s and iPhone 6s Plus are likely to incorporate Apple's latest A9 processors, while the smaller iPhone 6c may offer users the older Apple A8 chipReuters

Technology giant Apple, which released the flagship iPhone 6 and iPhone 6 Plus last year, is now reportedly set to introduce newer iterations in the iPhone 6 series in the second half of 2015.

According to a Digitimes report, the Cupertino-based company will launch newer iPhone models tentatively termed iPhone 6c, iPhone 6s and the large-screen iPhone 6s Plus.

The Digitimes report states that the iPhone 6c will be a 4in smartphone.

Moreover, the iPhone 6s and iPhone 6s Plus are likely to incorporate Apple's latest A9 processors, while the smaller iPhone 6c may offer users the older Apple A8 chip.

All of the above handsets are expected to feature the latest version of Corning's Gorilla Glass screen protectors.

Other technical aspects of the iPhone 6c, iPhone 6s and iPhone 6s Plus have not surfaced as yet, but according to an earlier report, the "more advanced" iPhone 6s and iPhone 6s Plus are likely to feature 2GB RAM. The current-gen iPhone 6 and iPhone 6 Plus have 1GB of RAM.

Reports also suggest that the iPhone 6s and iPhone 6s Plus could be shipped with a pre-installed Apple SIM (universal SIM card). Apple SIM currently features in the iPad Air 2 that was released in October 2014 in the US and UK. With an Apple SIM pre-installed, users can choose from a host of available carrier options, rather than having to sign-up with a particular operator's contract.