Here are some tips to help you hold on to that iPhone. Be aware of your surroundings and the people around you. Don't allow your attention to become distracted from your property. If you are using an iPhone, don't use the standard issue white headphones as these are identified with the devices. Use the security features, such as a security code login, to protect your information from identity theft. If you are a victim of a crime, do not resist. Work with police and use a "find-your-phone'' app to track down your missing device, lock it, or remotely delete any data it contains. If you see a theft in progress, call 911.
Source: SF Muni
Contact Patrick May at 408-920-5689 or follow him at Twitter.com/patmaymerc