iPhone presence not working

[smart (Ron S)]

Can you check if this helps (ignore the second account part):

Setting up multiple iPhones (separate linked accounts) as presence sensors for dummies

I have 2 of 3 iPhones working as presence sensors on 2 different ST accounts. We have created a 3rd account and correctly geolocated it here at my house. However, we are unable to connect it to my home SmartThings network. We followed all the steps above with no luck. Ideas are appreciated.