Orbi app trusted devices and phone numbers

I can't see how to set/reset my Orbi trusted devices and phone number

I go to Account Management --> Login Settings-->Two-step Verification

I used to have 2 trusted devices.  But no idea what they actually where (I assume old phones).  I deleted one.  Can't delete the final device and can't add a new device (only option is to swipe to "edit" device, but you can only change its name).

I also used to have a SMS number.  But I wasn't sure it was being used by Circle, so delete it.  Now can't add it back in.

All this was in an attempt to get the Circle app to work. 

• I installed it for the 1st time on new phone.
• Clicked Manage Circle
• Clicked "I'm the only Circle admin"
• Clicked "Text me"
• never got a text. No idea what number it sent it to (hence messing around above). But never got a text.

Any idea how between the 2 apps to set my phone number and my trusted device so I can receive an SMS on Circle to configure it?

Many thanks all!