Android What Is an Unlocked Phone? Everything You Need to Know An unlocked phone isn't tied to a specific carrier, which means you can use it on AT&T, Verizon, T-Mobile, or any MVNO you choose. This guide explains what unlocked means, how to tell if your phone is locked, how to get it unlocked, and why buying a used unlocked phone on Swappa is one of the smartest ways to save money on your next iPhone, Samsung Galaxy, or Android device.
Android What Is Google FRP? A Complete Buyer and Seller Guide Google FRP (Factory Reset Protection) is a built-in Android security feature that locks a device to the last registered Google account after a factory reset. For buyers of used Android phones, an FRP-locked device is unusable without the previous owner's credentials. For sellers, failing to remove FRP before shipping can result in a return. This guide explains exactly how FRP works, how to spot it before buying, and the step-by-step process sellers must follow to clear it before listing a device on Swappa.
Apple iPhone Face ID: What It Is, How It Works, and Tips to Use It Better iPhone Face ID is Apple's biometric face-recognition system, first introduced on the iPhone X in 2017 and now standard across the entire iPhone lineup. This guide covers how Face ID works, every iPhone model that supports it, the most common problems users run into, and practical tips to get the most out of it. Whether you're troubleshooting a unlock failure or shopping for a used iPhone, here's what you need to know.
