How do I find out who is calling me?

[Onfayno]

How can I know who is calling me when the number is not stored on my phone before picking the call?

[Evakone]

How can I know who is calling me when the number is not stored on my phone before picking the call?

Since you're looking for a way to find out who is calling you, one of the easiest options is using whoeasy. Or you can try an app on your smartphone. There are several apps that perform this service, including TrueCaller and Spy Dialer. Both allow you to search for information about people who have left you text messages or voicemails without having to enter any details about yourself before performing a search.