Your iPhone is a treasure trove of hidden applications and features, some of which are incredibly useful yet often overlooked. Among these are a TV remote control feature, a QR code scanner, and a unique field test application, each offering distinct functionalities that enhance the iPhone experience.

One of the most practical hidden features is the iPhone's built-in TV remote control. This feature is particularly handy when your regular remote is misplaced or unreachable. It's compatible with Apple TVs and smart TVs that support AirPlay, making it a convenient alternative to traditional remotes.

To find this hidden gem, access the Control Center on your iPhone. For models with Face ID, swipe down from the top-right corner of the screen. If your iPhone has a Home button, swipe up from the bottom edge. In the Control Center, look for the icon resembling a remote control, labeled Apple TV Remote.

If the TV remote application isn't immediately visible in your Control Center, you can add it through the Settings app. Once added, simply click the icon, select your Apple TV or compatible smart TV, and follow the on-screen prompts to use your iPhone as a remote control.

Another hidden feature is the Code Scanner application, pre-installed on all iPhone models. This app allows you to quickly scan QR codes. To launch it, swipe down on the Home Screen to access the search bar, type in 'Code Scanner,' and point your iPhone's camera at a QR code to scan.

The Field Test application is a lesser-known feature that provides detailed cellular measurements. To access it, turn off Wi-Fi, open the Phone app, go to the dialpad, enter, and press the call button. This app offers a range of cellular data, including signal strength indicators.

The Field Test app displays your iPhone's signal strength in decibel milliwatts, offering a more precise reading than standard signal bars. The signal strength is shown as a negative number, with values closer to zero indicating stronger signals. This tool is particularly useful for understanding and optimizing your iPhone's connectivity in various locations.