Don’t trust your phone – it can lie to you. Or more accurately, criminals can lie to you by manipulating your phone’s caller ID to make you think you’re speaking to someone else. If someone rings you from a withheld number claiming to be from your bank, you’re likely to be suspicious – and scammers know this. So to achieve a veneer of authenticity in their attempt to part you from your cash, they’ll make the number that appears on your screen match the one on your bank statement, or on the back of your debit card.

https://www.scotsman.com/news/opinion/columnists/jenny-ross-who-s-calling-it-may-not-be-who-it-seems-1-5033302