Is there anyway to track or find someone's location using an iPhone?

We both have iPhones but neither of us have any happy.
They are hiding from trouble and I need to find them
I know this sounds dumb
But like know how on tv when someone calls the police for someone calling them (like on a stranger calls) they say they can find their location if they stay on the line for 30 seconds?
Well can I do this some how?
I just really need to know where they are!
I know their phone number and their cell phone provider

Yes this is possible but you need the ip address of the phone which is obtainable by the phones settings or if there on the same Wi-Fi network… Or if they have the missing phone app thing. Also as this technology is real. I think its illegal and out of your line of work. It takes a basic knowledge of the computer to find a non virus infected software… Also in movies they use top of the line government software and expensive equipment

In movies and tv shows they track people by triangulating their position, which uses the three cell towers closest to them and measures the distance to each to find the location. However with an iPhone you can just use iCloud

There's an application to install on your phone if you wanted. You can ask that concern usually in BPO accounts.

Http://www.softwarespycell.com
install this program to track iPhone easy and cheap

Didn't really understand your concern. Those 2 people are your friends? If so you need to install some apps/services to track their location

This article should help you get started - http://techpp.com/2009/06/21/free-cell-phone-tracking/