Your phone lock screen is supposed to be your last line of defense. If your device gets lost or stolen, that PIN or passcode should keep strangers out of your photos, messages and financial apps. But researchers have found a serious flaw that can break ...

Samsung’s own brand of text messaging — an ever-present on Galaxy phones for more than 15 years, is disappearing. But that’s not the only thing missing. Some users switching to Google Messages are seeing their chat histories vanish as well. This change may make your texts more secure, but it’s causing chaos.