Mobile devices provide a lot of different methods of communication:

• Phone Calls

• SMS

• MMS

• iMessage

• Data

• Bluetooth

As we are all users of mobile devices we should all be familair with these types of communication.

Once the carrier has been determined, you can request information from them about calls made or received, SMS/MMS messages sent or received, and data usage. 

To help determine the carrier, the following can be used:

FoneFinder: http://www.fonefinder.net/

WhitePages: https://www.whitepages.com/

A request should be submitted to the carrier to ensure the data is not deleted from their records. This can provide additional time to obtain a warrant or complete other legal processes.