Apple (AAPL) stocks usually surge weeks ahead of its device launch, but it was just the opposite with its latest device iPhone 6s and 6s Plus which could be seen as investors' unhappiness over lack of novelty.

The fact is that the company's shares dropped 30 days before its unveiling event, though it picked up later. Now reports are doing the rounds that the future device, dubbed as iPhone 7, will come with features much superior to iPhone 6s.

iPhone 7 is expected to be unveiled in September 2016 by the time iPhone 6s and 6s Plus complete one-year cycle in the market. The company has apparently started "placing orders for iPhone 7 parts" and mass production of A10 chip may begin in March 2016 with Taiwan Semiconductor Manufacturing Company (TSMC) securing exclusive supply contract, according to a report by Geek.

iPhone 6s and 6s Plus are just upgraded versions of iPhone 6 and 6 Plus respectively, and there is nothing much to boast of except the 3D Touch technology. The devices wear almost the same look and feature upgrades were small. In short, there was no novelty.

However, iPhone 7 is expected to come with a major overhaul, including design and unique features. It is expected to be much sleeker and slimmer than the previous iPhones.

According to DigiTimes, analyst Ming-Chi Kuo of KGI Securities has said in a note to investors (citing sources) that Apple is planning to make its upcoming iPhone, possibly iPhone 7, between 6.0 and 6.5 mm thick, which will be as thin as iPod Touch and iPad Air 2 that are 6.1mm thick.

A report by BGR also claimed that Apple has filed a patent that hints introduction of display technology that registers touch pressure and reads fingerprints, and thus do away with home button. This means future iPhones, possibly iPhone 7, can look like Android handsets with bigger display because of narrow bezel. 

iPhone 7 may also come with camera much superior to the one seen in iPhone 6s. Business Insider has reported citing a source close to Apple's supply chain that the company is ordering six-element lenses for its future iPhone, perhaps iPhone 7. 

Interestingly, Apple has filed several patents, like "Protective Mechanism for an Electronic Device", "Touch Surface for Simulating Materials", "Elevated Joystick" and "Mirror Tilt Actuation". So, the company could introduce at least a couple of them in its upcoming flagship device.