Echo needs to be in the foreground of your phone to establish a connection. Once connected, it can run in the background. 

How to connect

1. Open Echo on your phone (you do not need to do anything on your watch). Tap to start so it says, 'Waiting to connect'
   
2. Press the Bluetooth Smart button on your console. The console pairing number will appear on the display
   
3. When a connection is established, the LED on the console will flash red twice, indicating you're connected
   

Additional info can be found on iFit's support page.