6 digit phone numbers

[Stephen_1394742]

When I  get a marketing text, it usually comes from a 6 digit number beginning with "6".  To opt out of further marketing, you usually have to reply with the word "STOP" or similar.  However whenever I try, I always get a message send failure.  Is there a way around this.  It's not a setting on my iPhone, I've already checked.

[jassingh · Accepted solution]

Yes, this is a known restriction - Smarty does not, at present, support sending messages to shortcode numbers. You can ask webchat if they have an updates on when this might be available though I think this is in the works.
There is no way around this, and affects all phones (Android and iOS) - see this discussion thread