Sending commands with NB-IoT SIM not working
I am trying to follow this document: https://www.twilio.com/docs/api/wireless/sending-machine-machine-commands using a registered and active SIM purchased from Twilio, but always receive back a response:
Free Msg: Unable to send message - Message Blocking is active.
Using the AT command set, I am able to open a https connection, as well as ping an IP address, so the device is successfully connected to the network. How do I send commands to the 2936 shortcode (tried both "2936" and "+2936")?
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