Go to Settings > Messages > Blocked Contacts to ensure you haven't accidentally blocked a specific shortcode.
How to Unblock Shortcode Texting on T-Mobile Shortcode texting is essential for receiving one-time passwords, bank alerts, and two-factor authentication codes. If these messages aren't reaching your T-Mobile device, it is usually due to a specific account setting called Short Code Blacklist. Use the following methods to restore your service. Primary Solution: Update Account Settings how to unblock shortcode texting t mobile work