Alexa app helps you to connect Alexa very easily, once you do Alexa setup after that you can also connect other smart devices at your home. Alexa app for pc helps you to connect Alexa very easily and you need to download Alexa app on your computer, you can also open up a link alexa.amazon.com to connect Echo dot.
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http://ftp.educatedearth.net/myearth/forum/viewtopic.php?f=16&t=70933&p=170259#p170259
https://www.articlepole.com/forum-thread/1765/how-do-i-set-up-my-netgear-wifi-range-
extender.phphttp://biz.ratebe.com.au/p272070/Mywifiext-net-Setup.html?ac=msg