To change the ghost icon into a photo of you (or a series of them), click the ghost icon at the top center of the main screen. From there, tap the white ghost QR code icon and you’ll be prompted ...

Next to Hotspot Name, tap the QR code icon. You’ll have to authenticate yourself using your preferred method. Then, you’ll see your hotspot’s QR code.

You can create your own QR code and direct people to a specific website, document, or any other type of media.

First, LinkedIn will now let you connect through QR codes. In the LinkedIn app, tap the QR code icon in the Home tab's search bar, and there you'll see a QR scanner as well as your own code.