Here's how the Nomorobo SMS Spam Text blocker works:
The Nomorobo SMS Spam Text Blocker allows you to automatically filter spam text messages in the Messages App. Simply activate the feature by following the instructions in the Nomorobo App (Open the Settings App > Messages > Unknown & Spam > Enable Nomorobo).
*Please note, as long as you have the settings configured correctly in the Settings App, the Spam Text Blocking feature is active. The Nomorobo App won't change to show the feature is active, but rest assured it is.*
After activating the Spam Text blocker, any spam text identified by Nomorobo will be sorted into the Junk folder in the Messages App. You will not receive notifications for messages categorized as Junk, but you can access the folder by going to the Messages App > Filters > Junk.
Nomorobo identifies spam texts in the following ways: First, by phone number, matching it with our robocaller database of over 4 Million robocallers. Second, by URLs in the body of the text message. We have a growing list of suspicious URLs, as well as a list of URLs that are allowed and will never be identified as Junk.
In the event that a legitimate text is mistakenly identified as Junk, the quickest way to ensure any future text from this number are allowed through, is to add the number as a contact. To do this tap the Number > Info > Create New Contact. Any number that's in your contacts will never be blocked by the Spam Text Blocker. Adding it as a contact will also move the text from Junk to All Messages/Known Senders.
If a spam text is not filtered into Junk, please report the number to Nomorobo (Tap the Number > Info > Info > Share Contact > Nomorobo. You may also consider blocking the caller directly on your iPhone (Tap the Number > Info > Info > Block this Caller).
When you receive an SMS message, your iPhone will send the sender’s phone number and the contents of that SMS message to Nomorobo. This allows Nomorobo to analyze the contents of text messages and proactively block new spammers based on message content rather than simply blocking messages from a list of phone numbers. As time goes on, the Spam Text Blocker will get better and better.
*Please note, Nomorobo will not be able to filter texts that come from an email address.*