First, open the Phone link app on your Laptop. Choose iPhone when prompted. If you also have an Android phone, you can add the device using Settings>My Devices and click the Add Device button. Next, you will see a QR Code. In your iOS device, open the Camera App and scan the QR Code. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.