How do I remove spam blocker from my iPhone?

The easiest way is to delete spam blocker apps that you may have downloaded. If you are referring to the Silence Unknown Callers feature of the iPhone, then you can disable it by opening Settings 👉 Phone 👉 Silence Unknown Callers: Ensure that this switch is set to OFF.

Please review this guide published by Apple and use its contents when they match the condition of your iPhone 👉 Detect and block spam phone calls - Apple Support. This guide will show you where to look to delete apps and which switches to turn OFF.

Axel F.