Americans’ personal data could be collected and stored overseas — even if they’ve never downloaded a foreign-developed app themselves — according to a new FBI alert warning about the risks tied to popular mobile platforms. That means information like a person’s name, email address or phone number could be pulled from someone else’s contact list and potentially stored abroad if a friend or family member grants an app access to their device. The warning comes after years of scrutiny over TikTok’s ties to China, but the FBI alert suggests the concerns extend beyond any single platform to a broader range...