Hi,

Try the following to stop the echo with Bluetooth Headset.
Remove the battery from 7130e.
Replace battery
Select OPTIONS icon
Select Bluetooth
Select the Bluetooth accessory for which the 7130e is paired to
Select DEVICE PROPERTIES
Select ECHO CONTROL
Select CHANGE OPTION
Set to 'ON'
Select SAVE

I have used this setting for many different Bluetooth headsets and it works great. Good luck