GSM Triangulation accuracy depends on the cell site density of the area the phone is in. In London, you might get down to a 50m radius if you're lucky, but in London that's a lot of places to search. In rural areas, you might be looking at a couple of miles radius. I know this because I spent two years looking after location-based services for Orange. GPS is the way to go.
GSM Triangulation accuracy depends on the cell site density of the area the phone is in. In London, you might get down to a 50m radius if you're lucky, but in London that's a lot of places to search. In rural areas, you might be looking at a couple of miles radius. I know this because I spent two years looking after location-based services for Orange. GPS is the way to go.