Is it a scam?

No one on the other end, they hung up after about 15 seconds

No one on the other end. after about 5 seconds hung up

Calls my work mobile every single day, sometimes multiple times a day. Leaves no message. No one speaks when called back. Incredibly annoying.

Caller: Said his name was john knew my first and last name

Unknown company he works for.. strange did they know anyone else's name that have posted reviews

Called my mother no msg scam

So tired of these scammer ringing

Caller: serial crims

yes it is a scam , never answer !

They didn't leave a message, and when I phoned the number back, they hung up as soon they answered.

Missed call, no message left.