Description:  "The mobile phone or mobile, also called a cellular phone, or cell phone is a long- range, portable electronic device used for mobile communication that uses a network of specialized base stations known as cell sites. In addition to the standard voice function of a telephone, current mobile phones can support many additional services such as SMS for text messaging, email, packet switching for access to the Internet, and MMS for sending and receiving photos and video." http://en.wikipedia.org/wiki/Mobile_communication . Corporate Blackberry™, pager, RFID trackers and other systems may be run on network servers that retain message information. If mobile phone information is critical to the litigation, it may require Third Party or Non Party discovery requests. Retrieving information from mobile devices without substantially altering the data requires specialized hardware and software, which can add to the time/cost of preservation and collection.