Android 10 brought some significant improvements for security and privacy which are refined in later versions, e.g. the concept of scoped storage, the opportunity to limit the access to some resources (e.g. location) to times when the app is in active use, and certain restrictions on background apps. Apps (except for privileged/system apps) are also prevented from accessing specific device information, e.g. non-resettable device identifiers like IMEI, IMSI, MEID, SIM, and build serial number.