Researchers have found a security breach in the iPhone software that allows a text message to be sent to the phone, which then can steal data, make calls, send text messages or download malware.http://news.cnet.com/8301-27080_3-10299378-245.html
Apple is reportedly aware of the issue, but as of July 30, 2009, has not released a patch. A similar breach was corrected by Google on their Google Android cell phones.http://news.cnet.com/8301-27080_3-10299378-245.html