Re: So they have a technology which is based on using other people's resources
"BT do this with the wifi on their home routers, they keep it very quiet though."
BT-WiFi-with-Fon?
Is that still a thing?
I used to see several of their SSIDs from various places I'm familiar with (mostly routine parts of central and north-west England, no retail temples, no airports). I've never managed to make a successful connection.
Biting the hand that feeds IT
