Earlier quoted context omitted.
It's a cellular telephone -- they need to know all the cell towers near you and direct your phone between them. It's a rough area but my phone provider definitely knows I'm at work right now.
GP said, "cannot function." How did cellphones work before they came with GPS?
If it does not do this, it is not a cellular phone. There are other types of portable phones that don't work this way, like cordless landline phones (the base doesn't know where it is, just that it's plugged into a phone jack) or satellite phones. But the "cellular" part refers specifically to dividing up the terrain into cells, finding which cell the phone is in, and assigning it to a tower based on that determination.
(This is all pretty irrelevant to the point I was making above that cellular network operators can easily choose not to use the location information or signal strength information for anything other than routing calls, and that deciding that they can just use the information however they want would be creepy.)