Certain phone models come with a built-in QR code scanner in HiVision mode. For example, on Huawei devices, this mode is represented by an eye-shaped icon and can be found by swiping up from the lock ...

If your friend wants to get on your Wi-Fi, you don't have to share your (possibly long and confusing) password. Here's how to generate a QR code containing your network password and have them log on ...