The iPhone 11, iPhone 11 Pro, and iPhone 11 Pro Max introduced Apple's U1 chip with Ultra Wideband (UWB) technology. This feature allows the iPhone to understand its location in relation to other UWB devices, providing what Apple calls "GPS at the scale of your living room". For example, AirDrop knows when you're pointing your iPhone at another iPhone to share content between devices.
You may have photos in your camera roll that you would rather others not see, because they are simply private - whether they are embarrassing, compromising, have private data like passwords in them or otherwise. You probably want to keep them out of sight of somebody who might be browsing your camera roll, whether it is someone who stole your phone or simply a friend you handed it to to check out some pics. iOS offers a way to hide photos but surprisingly doesn't let you put them in a password protected album.
Many readers are probably already (and unfortunately) familiar with "neighbor scam" calls, a popular tactic of fraudsters in which they spoof a phone number that has the same area code and prefix (the first six digits) as your own number. People are much more likely to pick up a call from a number that could be in their area, thinking that it could be a friend or a local service. It can be quite maddening to receive multiple calls of this sort on a daily basis, so how can you block them?
Sign in with Apple offers a secure way to use your Apple ID across a variety of apps, websites, and services. When using Sign in with Apple, every account is automatically protected by two-factor authentication, and signing in via iPhone or iPad only requires Face ID or Touch ID. Apple even offers a way to hide your real email address when creating new accounts, with built-in forwarding to protect privacy.
AirDrop can be incredibly convenient for transferring images and other content between Apple devices. The feature can also be annoying. Receiving an unsolicited AirDrop request from a complete stranger can feel like an invasion of privacy. Especially if the pop-up content preview is NSFW.