https://www.iphonehacks.com/2021/12/how-use-truecaller-iphone-block-spam-calls-messages.html
..With rising call and message spam, it’s important to have them blocked before they start ruining your productive hours. This is where Truecaller comes into play.
Truecaller works differently on iPhone and Android. That’s primarily due to Apple’s restrictions regarding caller identification and tracking on iPhone.
It’s not a straightforward setup for Truecaller on iPhone. You need to make some changes to the iPhone Settings app…