Thank you … I learned a new word: Wangiri
As a rule of thumb never ring back an unknown number, or click on an unknown link. Unfortunately there are so many unwary people around who get caught out! Good to be reminded again.
Isn't it strange how we have changed? I am 64 I vividly remember telephones without display. So you never knew who was ringing. Nowadays we tend to assume that an unknown caller has a nefarious purpose. Recently I called a classmate from over 40 years ago. He answered the call … perhaps because he was on an old-fashioned landline.
BTW I had a most fascinating conversation with a young lady working in a call centre in Mauritius. She wanted to sell me funeral insurance. By the end of a 30 minute conversation she promised me to find a more meaningful job.