This is the title of a question raised by @mbatalla in Apr 2020 - unanswered though.
We need to know what the transmission overhead is to send a payload of data to IOT cloud.
5Mb is equivalent to 116 Bytes /min over thirty days. I would like to send about that much in the payload but initial measurements indicate that the overhead is MUCH greater.
If so it makes the use of the Arduino SIM useless. Comments please from Arduino?