Tracking a cell phone is a high technology process that allows the determination of the place of the cell phone any place all over the world. To determine the exact place, the cell phone must be turned on. The old models of cell phones can be tracked using signals that are generated from the cell phone and are collected with special towers.
New cell phone models are featured with built-in GPS tracking systems that help the tracking process and give the best accurate place determination. So, new models are easy to be tracked and every day there are new technology are coming to help the tracking process.
There are no websites on the internet can allow you to track any cell phone using GSM and GPS systems. It is not that easy to track and find the exact place of any cell phone online.
I wait for that technology to be available in the internet to find our family members and our friends to know where they are spending their time. That technology are now using only for security issues and not for individual uses.