Called 7 times in a row in quick succession. I almost thought it was legit as spammers/bots have often called twice in a row in the past but not more than that. So I picked up momentarily after 3rd call and when no one answered immediately I hung up after which it rang 4 more times in quick succession. So fast I didn't even have time to use the phones browser to look up the number because the incoming call screen took me from the browser window.