Hello @fionasoon ,
We hope you have a great 2022.
Does the error message say anything else? Maybe a response code?
What I do see, is that your User-Agent is the same as for the SIM-900. This can sometimes cause these type of issues. Could you please change the User-Agent to another random string so that we don’t have any possible collisions on the request?
I’ll be attentive for when you try this out.
Best regards,
Sebastián