I was following this thread, thinking about implementing this solution because my wife and I had constant issues with mobile presence. It may have something to do with us living in the middle of nowhere. Anyways, I found that using Life360 integration with smartthings rather than phone presence has been working flawlessly for my wife and I so far (knock on wood).
I was having an issue where hers worked but mine didn’t and I think it was because I setup the life360 smartapp twice, once for my life360 account and once for hers. Since I installed the life360 smartapp just once and imported all users under that one account, it has been working fine. Also, I have wi-fi, gps, and location services turned on for both phones (Android). I’m passing this along in case it helps someone else! 