iPhone 18 Pro and Pro Max: Planning to Purchase? 10 Key Details You Must Know Before You Buy

September 14, 2026: In India, Apple unveiled the iPhone 18 Pro and iPhone 18 Pro Max on 12th September. The new Pro models bring several important upgrades to the camera, processor, battery, artificial intelligence, connectivity and thermal management. Some of these features are appearing on an iPhone for the first time, including variable aperture technology in the camera. Apple has also introduced the new C2 modem, the 2nm A20 Pro chip and an improved Dynamic Island.

Throughout this article, we will share 10 must-know details that you should know before purchasing the iPhone 18 Pro or iPhone 18 Pro Max.

1. Variable aperture first seen on an iPhone

The biggest camera upgrade in the iPhone 18 Pro series is the variable aperture of its 48-megapixel Fusion main camera. According to Apple, this is the first time that the camera aperture has been changed on an iPhone. The camera has a six-laser-cut blade mechanism that can effortlessly switch between different apertures. This results in greater control over light and depth of field.

2. Apple Reference Image

Apple has also introduced a new feature called Apple Reference Image in the iPhone 18 Pro. It uses data from the camera sensor to create an unchangeable reference image. It can be viewed alongside the original image in the Photos app, which helps determine whether any changes have been made to the image.

3. First 2-nanometer A20 Pro chip

The iPhone 18 Pro and iPhone 18 Pro Max feature the new A20 Pro chip, which is made on a 2-nanometer process. Apple claims that it has 50 percent more memory bandwidth than the A19 Pro.

4. Apple's C2 Modem

Apple has introduced its C2 next-generation cellular modem system in the iPhone 18 Pro. It uses AI-based technology to improve connectivity quality and reliability. According to Apple, the C2 modem can deliver faster upload speeds than the C1X and consumes 15 percent less power. It also supports mmWave in the US.

5. New Siri AI for the first time on an iPhone

Siri AI will be available as a beta version on the iPhone 18 Pro series with iOS 27. The new Siri can help users find important information from messages, mail, photos, and other places by understanding their personal context. It can also understand the content on the screen and act on it. The camera's Siri mode allows users to gather information about the objects in front of them. Apple has also improved features like Intelligent Photo Editing and Image Playground.

6. iPhone Handoff for the First Time

iOS 27 also introduced the iPhone Handoff feature. Users on supported carriers can easily switch between two iPhone models using a single phone number. This feature can be especially useful for those who use multiple iPhones.

7. Professional Camera Controls

In addition to variable aperture, Apple has also taken the Pro Controls in the Camera app to a new level. Users can now manually change settings like aperture, shutter speed, and white balance, and can also check exposure levels using a histogram.

8. Cinematic Effects

New features have also been added to video. Videos captured on the iPhone 18 Pro at up to 60fps can now have cinematic effects applied after recording. 4K and Dolby Vision HDR video recording is also possible in time-lapse mode.

9. iPhone 18 Pro is not just a camera upgrade

iPhone 18 Pro is not just a camera upgrade It would not be correct to call the iPhone 18 Pro series a new iPhone with only improved cameras. Apple has also made significant changes to the camera, chip, AI, connectivity, battery and thermal management.

​​10. First-ever variable aperture

Notably, changes such as the first-ever variable aperture, Apple reference image and C2 modem set it apart from the previous Pro models. Pre-orders for the new series will start from September 12th and sales will start from September 18th. India is also among the countries where it will be available first.