This sounds particularly bad. Was there a lot of dropped packets or did you find any other badness with 3G vs HTTPS?
These devices are installed in vehicles on rural roads so you can assume that we saw every conceivable kind of connectivity issue but bill shock was of the most importance to the client.
Countries have a bunch of satellites that transmit data unencrypted... not like it is all top secret, but TLS is not an option. There are so many different reasons why TLS breaks, and stock TCP can be horribly inefficient for different use cases.
Just a bit curious, since cellular ~3G transport is probably going to get a lot more common in the next few years.
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