if i set up 1 echo dot for phone calls do i have to set up all or just the 1 and all will work ? null

Question

SylviaM · Accepted Answer

all should work

FireTV · Answer

The Echo Dot lets you make Free phone calls & video calls

Amazon Devices Customer Support · Answer

Hello,
 You can use Drop In to instantly check-in with others in your household. Drop In is an optional feature that lets you connect instantly to supported Alexa-enabled devices, like an intercom. Use Drop In to open an instant conversation between your devices or with your Alexa contacts. When you receive a Drop In, the light indicator on your Echo pulses green and you connect to your contact automatically. You can use Drop In to: 
1. Have a two-way conversation by connecting to one of your Alexa-enabled devices (""drop in on Kitchen""). 
2. Connect to a specific device group (""drop in on living room""). Only one Alexa-enabled device from the device group connects.
3. Have a group conversation with all supported Alexa-enabled devices under your Amazon household, which are not set to do not disturb. To start a group conversation ask Alexa to Drop In everywhere. All supported Alexa-enabled devices under your Amazon household account will connect regardless of their physical location.
4. Drop In on a contact who granted you Drop In permissions. 
5. Receive Drop In from a contact whom you granted Drop In permissions. 
To make calls, you follow similar steps through the app, just allowing calls to each device.  I hope this information helps, 
Have a great day!

“if i set up 1 echo dot for phone calls do i have to set up all or just the 1 and all will work ?”

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