For the setup, you need to have a smartphone or a tablet on which you can Download Alexa app to setup Echo.
Do check the compatibility of the app with your operating system version as Alexa app is compatible with Android 5.0 or higher and iOS 9.0 or higher versions only.
The Echo device setup can also be done through any desktop or PC by visiting Alexa.Amazon.Com from your browser.
If accessed through the browser on your smartphone, this web address will guide you to Download Alexa App to Setup Echo.
Once you have the latest version of Alexa app, you can begin to set up Echo through the following steps:
1. Open and sign in to Alexa app
2. Plugin your Echo in the power outlet
3. select your Echo device in Alexa app.
4. connect the Echo to WiFi.
5. Talk to Alexa