One of the most popular tools for identifying unknown callers and blocking spam calls and SMS messages has received new functionality for iPhone.
Here's how to block messages on your iPhone. How to block text messages on your iPhone 1. Open the Messages app on your iPhone. 2. Open the text message from the number or contact you wish you block.
An app like RoboKiller, available for both iPhone and Android, can dramatically reduce the spam you receive, both in the form of phone calls and text messages. These apps aren't free, though.