Call towers used by your cell phone provide an accurate guide to your location. Text messages supply not only the words used but to whom the words are sent with the time sent and received. Pictures taken not only provide evidence of the picture itself but can provide the location of where the picture was taken imbedded within the photograph. For internet usage from the phone the ip address tracks location of the phone as well as ip session and destination information, in other words everything you do on the web.
Links Phones and Evidence:
E-Evidence Information Center - Cellular/Mobile Phone Forensics
Computer and Cell Phone Forensics Information Examiners
Mobile phone - Wikipedia, the free encyclopedia
Federal Crimes Trial Lawyer & Criminal Defense Attorney in Florida
White Collar Crime Criminal Defense Attorney in Clearwater, FL
The following Department of Justice document lists the times for each category of information availability for every major American mobile service provider: