hangs up when you answer.
Called back and a recorded voice said "welcome" and elevator music started. No further info was given, hung up after a minute of music.

They hang up when you answer. Identified not as spam

I phoned back. Just a voice that says "Welcome" and then music that starts to play

Block this caller

block it

Same as others. Blocked and reported.

they call and hang up all the time.

Hung up

Have called twice, ramg them back & got 'welcome' then non stop music

Dodgy hang up call. You answering it makes them money. BLOCK!!