How to use the phone number to send and receive messages on devices signed into the Google account?

Device pairing allows you to use your phone number to send and receive messages on your devices signed into your Google account. This enables you to access the conversations from a computer, tablet, or other supported devices.
To use device pairing in the Messages APP, please refer to the following steps:
1. Open the [Messages] APP;
2. Tap [Profile];
3. Select [Device pairing];
4. Open Google Messages on your other devices or go to the Google Messages for web;
5. On your other devices, sign in to the same Google account;
6. You can tap [Switch to QR pairing] to pair the devices.
Note:
This function requires a network connection on both devices.