These are mobile providers that can check data about phone numbers and provide such information to the police upon legal request. There’s no other way to spy on a phone number. However, when seeking to spy on a phone number, usually people mean spying on a phone itself. They want to know the information about the phone’s user. And the device is the best information giver. There is a way better option to spy on someone by their phone. It is spyware.
Spyware is a tracking, service-backed software that logs every activity ever made on the target device. It stores relevant data in a safe place – an online account where only the app’s user has access to. The applications that provide spying services are mSpy, PhoneSheriff, FlexiSpy, SpyBubble.