How do I deactivate the SMS Spam Filter? Updated April 17, 2019 10:30 Follow To deactivate this feature, visit your iPhone settings: 1. Tap on 'Messages' 2. SMS Filtering > Disable Truecaller. Related articles How do i disable notifications from blocked calls or messages? How do I unlist my phone number? Where are my blocked (spam) messages? I've deleted the app but I still get notified about spam calls (red screen) How do I create a spam filter? Comments 0 comments Please sign in to leave a comment.