 i get this question all the time how do i block text messages how do i do that okay you can reply with stop and if it's a legitimate organization they will take you off the list but what if it's not a legitimate organization well if you have an iphone in settings under messages you can turn on filter unknown senders now on android you can open the phone app tap on the three dot icon and dive into settings then turn on caller id and spam again that's filter unknown center it's going to put in a special folder on your iphone by the way