If you plan on selling your phone or giving it to a friend, make sure you delete everything that’s on it first. Take a minute to think about which files you want to hold on to. These could be pictures, messages, phone numbers, notes, etc. Back all of that data up into the cloud or onto a hard drive. Then, give the phone a “factory data reset.” This will make it so that nobody, including cybercriminals, can get access to the data you kept on your phone.