How to Track a Cell Phone by its Number?
Tracking someone else’s phone constitutes a major invasion of privacy, no doubts about it. This is irrespective of your intention being good or bad. Think again if this is the only way out for you, before proceeding further.
Most cell phone tracking methods work on the premise that the cell phone often “pings” the nearest cell operator’s towers. GPS-enabled cell phones don’t require cell towers, and may be located anywhere in the world by satellite triangulation in a similar manner.
In some countries like US, cell companies are mandated to keep track of cell phones to an accuracy of 100 feet, so that help can be made available in case of emergency.