Is there more information available on using USSD, or do I have to contact the service provider about it?
What do you mean Chris? On module side things are controlled with AT+CUSD, the network provider can have several services implemented with USSD, usually published on their information facilities.
I’m trying to discover what is possible to do with USSD. Is it only for comms with the provider, or can I send messages to other addresses?
They are network driven, you cannot do more than is offered.
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