How to locate other’s GSM location without GPS?
I am looking for Frank, he is in some situation that he can’t response through his GSM cell phone. But he needs my help and I need to know about his location. I and he may not have GPS. So is it possible for me to find his approximate or accurate position?


Technically it can be done, using triangulation. That is, by measuring the signal strength at nearby GSM antenna’s, the handset’s location can be defined more or less accurately. If the GSM operator has the right SW, he can have that data but it’s not accessible to anyone because of privacy concerns.
Some operators offer applications based on that data though.