> Do you know why Apple or Google doesn't provide this kind of unique id ? This picture explains https://imgur.com/a/XYTNRN3 https://imgur.com/a/XYTNRN3 Chin

> Do you know why Apple or Google doesn't provide this kind of unique id ? This picture explains https://imgur.com/a/XYTNRN3 https://imgur.com/a/XYTNRN3 Chinese can recycle real iPhone/Android devices at minimal cost. Anyone can rent a fleet of real devices, then RCE software can execute any kind of task you want on a real app on a real phone. So even Apple or Google provide some kind of unique id, e.g. iOS already have something like identifierForVendor, the spammers emulate a real user's app download, registration, login process, thus obtaining a real ID. So what can you do about the ID? So the obvious solution is to check for more user information beyond a simple ID. Your IP, mac address, wifi router address, other process the OS is running, device parameters, etc. and privacy is f??ked in the process.