When I use Outlook 2013 add-in the sender ID is +44 7800 000xxx always. Whatever I set reply able or user defined numeric or alphanumeric, the ID not changed. But if I use WebSMS service the unique sender ID work as well. Is it an error or policy for foreign country users? Of course the +44 7800 000xxx is reply able, but problem is: nobody reply for +44 number because it is not our country.