Quite excellent advice.
For Note 2 there was no separate box to activate the ring feature. But I went to the Google Web site and confirmed that option was turned on.
I played with this 'setting' the day I found it, and after reading the article, I thought I would give it a try..
My DX was located within a radius of 2,700 feet.Funny, that's about how far I am from the tower that was erected a few years ago. I know what panel antenna my area is being served by, so I am certain one could compute the actual distance by triangulation with RSSI readings.