The iPhone 7’s overall design is similar to iPhone 6S and iPhone 6. Changes introduced included new color options (matte black and jet black), water and dust resistance, a new capacitive, static home button, revised antenna bands, and the controversial removal of the 3.5 mm headphone jack. The device’s internal hardware received upgrades, including a heterogeneous quad-core system-on-chip with improved system and graphics performance, upgraded 12 megapixel rear-facing cameras with optical image stabilization on all models, and an additional telephoto lens exclusive to the iPhone 7 Plus to provide enhanced (2x) optical zoom capabilities and portrait mode. The front camera is the first in the series with 1080p (Full HD) video resolution.

Excerpt source – Wikipedia