If you previously texted "STOP" to a shortcode, T-Mobile may block the entire shortcode category.
If you have tried the steps above and still cannot receive shortcode texts (specifically critical ones like banking codes), there may be a network-level block on your line that requires a representative to remove. how to unblock shortcode texting t mobile work
If the block is not at the carrier level, your phone might be filtering the messages. If you previously texted "STOP" to a shortcode,
Send the word "START" or "RESUME" .