<human>:  What are the main differences between the iPhone 11 and the iPhone 12 models?
<bot>: The main differences between the iPhone 11 and the iPhone 12 models are their design, display size, cameras, and processing power. The iPhone 12 has a slimmer and more modern design with flat edges, as compared to the curved edges of the iPhone 11. Additionally, the iPhone 12 models come in a 6.1 inch display size, while the iPhone 11 is 5.8 inches. The camera system on the iPhone 12 is also more advanced with an ultra-wide camera and improved night photography compared to the dual cameras on the iPhone 11. Lastly, the iPhone 12 models feature the A14 Bionic chip, which is the fastest chip ever in a smartphone, providing a faster and more powerful experience than the iPhone 11.