If you started a call with your cellphone close to a loudspeaker you could hear the connection being initiated through the speaker. Something like a tat-ara-tat sound.
I think they made a song with that noise, something dance or techno or house
“They” probably made a bunch, but I’d recommend you to check out Venjent - Calling for You (ft. Oktae) (and anything else from him tbh).