It won't be the iPhone 7, but Wednesday's looming iPhone announcement is still exciting. Two new iPhones are expected be introduced Wednesday at a special event held by Apple in San Francisco.

The 2015 updates to the iPhone 6 will be unnoticeable from the outside, but the iPhone 6s and iPhone 6s Plus are said to be receiving several internal improvements. At first glance, the iPhone 6s may look just like the iPhone 6, but with stronger materials and a Force Touch screen, it will be different.

Wednesday's event will confirm all of the details, but much is already suspected about the iPhone 6s and iPhone 6s Plus.

The iPhone 6s and 6s Plus might elect to use strong materials for the body of the smartphones. The Apple Watch Sport uses the strong Series 7000 aluminum alloy, and if Apple uses this for the new iPhones, the phones would be much stronger and not prone to bending when inside owners' pockets.

Recent drawings of what is said to be the iPhone 6s show that it is actually 0.2 mm thicker than the iPhone 6. This extra thickness could help make room for the Force Touch technology. Force Touch allows the phone to respond differently based on the amount of pressure applied to the screen.

The screen size of the iPhone 6s will likely stay at 4.7 inches, just like the iPhone 6. The larger iPhone 6s Plus will keep its big 5.5-inch screen, just like the iPhone 6 Plus. Both of these screens could be protected from scratches by sapphire glass for the first time.

An improved camera may be coming to the iPhone 6s. This means a 12 megapixel (MP) sensor could be coming to both phones. Previous iPhones have been stuck at 8 MP, and it will be nice to finally see a better camera. Along with the software on the iPhone, pictures coming from the iPhone 6s will be near DSLR-quality.

A new processor from Apple, the A9 may be inside the iPhone 6s. This chip will be more powerful and more efficient, leading to better battery life.

Finally, for the first time, an iPhone could be getting 2 GB of RAM. This means more multitasking and faster app loading.