"I've been using Android since version 1.5, so it's not often that a feature catches me off guard. You can imagine that when I do come across an unfamiliar Android feature, it's an exciting moment. For more casual (or newer) users of Google's mobile operating system, there are probably several hidden gems waiting to be discovered in Android, and some of these can be handy."
"You may not give this feature a second thought, but allow me to set a scene for you. Say you're having visitors for the holidays and want to grant them access to your Wi-Fi network. Instead of making the password public (so anyone can use it), you could share the Wi-Fi credentials via QR code. Not only does this approach simplify the process of adding another device to the network, but it does so with a nod to security."
Android allows Wi‑Fi sharing via a QR code to add devices without revealing the network password. Open Settings > Network and Internet > Internet, tap the network, choose Share, and verify identity using biometrics or PIN. The generated QR code can be scanned to automatically add the network or can be screenshotted and printed for guests. Android's Developer options can be enabled by any user to access a host of advanced settings and tools. Many features within Developer options are useful beyond developer needs and can provide additional control over device behavior.
Read at ZDNET
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