baconcheese113

"The fear of the AT Command is the beginning of wisdom

and the knowledge of the TLS handshake is understanding."

- Proverbs 9:10

This gist should help you troubleshoot your requests, leave a comment and star if it works (or doesn't) for you and see this thread for more background.

Uploading a certificate to the modem IS NOT REQUIRED TO USE HTTPS unless you're trying to host a domain from the modem

Here's the manual