cbs2 news reportrt marissa scott joins us live with information about what this means for cell phone users. >> reporter: the ruling is the first of its kind. several people told us they know why the fbi wants to retrieve information, but they also know that means s they can hack into their phone, which scares them. >> if you put a back door in, that back door is for everybody. >> reporter: the fbi is trying to find the missing pieces such as where they communicated with before killing 14 people in san bernardino. >> we still have one of those killers' phones which we have >> reporter: cell phone users shouldn't worry just yet basically in some cases a large chuck of someone's life, and that's very much privacy we want to protect."in the 90's, the united states supreme court ruled law enforcement has to get a warrant to search informaon onon cellphone. >> reporter: in the 90s, a completely new way of getting the phone unlocked.every iphone has an optional auto erase feature.if too many incorrect passwords are entered, the phone erases all the data.the fbi wants apple to figure out a w