I want to send and run a USSD code on mobile phones via PHP. I have an SMS gateway, can I send it through SMS or do I need to purchase an other service? I have been searching the net and didn't come to a solution that's perfect for me.
Some company's support told me that I can send it using XML in SMS.
The USSD command I want to run is :
1. *21*___SOME NO____#
2. #21#