While Apple's upcoming device, iPhone 6s will be 7 mm thick, the future iPhone dubbed as "iPhone 7" could be as thin as the iPod touch and iPad Air 2, a report said.

According to a report by Apple Insider, analyst Ming-Chi Kuo of KGI Securities has shared "iPhone 7" details in a note to investors. His sources have claimed that the upcoming iPhone will be between 6.0 and 6.5 mm thick, which means it will be on par with iPod touch and iPad Air 2 that measure only 6.1mm thick.

It may be mentioned that Apple's current flagship smartphone, the iPhone 6 is 6.9 mm thick.

However, a report by Digitimes that cited supply chains in Asia has claimed that Apple is planning to return to ultra-thin G/G touch panel technology for its future iPhone to be released in 2016 owing to issues like difficulty to increase screen resolution in in-cell technology.

Switching back to glass-on-glass technology could pose a challenge to Apple in reducing thickness of its device.

Nothing much is known about iPhone 7 since it hit headlines a few months ago before iPhone 6s and iPhone 6s Plus hogged the limelight. It's release date is expected to fall in September, 2016, by the time the iPhone 6s completes a year cycle.

"iPhone 7" is expected to have a significant upgrade over its predecessor and is expected to come with most of the latest features, including Force Touch.

"Apple and its suppliers have invested heavily in iPhone Force Touch in 2015 and we believe the 2016 models will stick with a similar Force Touch structure as used in 2015," wrote Ming-Chi Kuo.

Apple has filed a few patents like "Protective Mechanism for an Electronic Device", "Touch Surface for Simulating Materials", "Elevated Joystick", and "Mirror Tilt Actuation," so it won't come as a surprise if iPhone 7 comes with these features.