You may decide to sell or give your Echo Dot 2 smart speaker to another person. or wish to link it to a different Amazon account, or connect it to a different WiFi network. Here, we cover How to Reset Alexa Echo Speaker Gen 2 Dot, which reloads its factory default settings.
To unlink this device from its current Amazon Alexa account, assure that it forgets the WiFi connection information stored within, and to restore this speaker to factory default (fresh out of the box) values, perform the following procedure.
Note that if you’re just trying to correct erratic behavior of the Echo Dot 2, a complete reset may not be necessary. So, before resetting, try powering off the unit for fifteen seconds, by unplugging its USB power cable either from the wall outlet, or from the unit itself. Wait for a quarter minute, and then connect it back up. This often restores proper operation. But if not, read on for the proper reset procedure.
Once reset, you’ll no longer be able to control the Echo Dot 2 from the account where you controlled it from before, unless you run through the setup procedure again, and relink it to that account via the Alexa app.

How to Reset Alexa Echo Speaker Gen 2 Dot: Step by Step
1. Attach Power Cable
Connect the speaker to its USB power.
2. Press the Reset Button Combo
Once the light ring goes completely dark, press and hold the Microphone Mute and Volume Down (-) buttons simultaneously for approximately five seconds, until the light ring turns orange, and then blue.
3. Wait for Reset to Complete
After a several-seconds pause, the light ring goes completely dark for a few seconds, and then turns orange.

4. What Happens After Reset
Your Echo Dot 2nd Generation smart speaker has now been restored to its factory default settings and has entered setup mode.
5. Pack it Up or Set it Up Again

You may now feel free to give your dot to another without fear that they’ll have access to the settings on your Amazon account. Or, you can set it up again on your existing account. Once the light ring turns orange, the unit remains in setup mode until someone executes the published setup procedure. The Echo Dot 2 will not work until properly set up and linked to an Amazon account.