You can then add the Echo device through the Bluetooth settings. Once you've paired your Echo device for the first time, all you need to do is say 'Alexa, connect ... t have a Wi-Fi connection.

Echo Connect employs the Alexa app in the user's smartphone to identify phone contacts. See Amazon Echo. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

If you have the right Amazon Echo you can directly connect Zigbee smart home devices to it without the need for Wi-Fi.