Massive LTE Data Usage
Above is my LTE data usage for this month of April. At the start of the day this morning on the 29th, I was at 3.5GB used.
I was just on my way back from home about half hour ago. While on the subway and connected to NextDNS setup, I streamed a little less than 30 minutes of video in 480p (not even 720p HD at that) and got a shock when I was alerted that I reached 10GB of data usage this month!
I checked to see that this one app, SBS, which is an app from a major landline TV network (equivalent to CBS, ABC, NBC and the likes in the U.S.) is the culprit. I spent literally less than 30 minutes streaming content in 480p quality and I get hit with 5.6 GB of data usage all in that short period of time?
I turned off all private DNS connection and all is back to normal. So it seems that, for whatever reason, an app can go berserk and spend godly amount of data? How could anyone explain this?
I thought private DNS setup is supposed to help REDUCE data usage, NOT increase it by hundredfold (is that even a word?) like this.
Maybe someone with more expertise can explain for me. Now I am scared to turn on my NextDNS setup while I am out and about. At that rate, I will hit 50GB in half a day!
Agree with you that streaming has nothing to do with DNS.
However, it could be that the streaming app is not getting a particular DNS response because NextDNS is blocking it.
Depending how it is written, the app can reissue the query until it gets a good reply.
This can lead to quite an amount of queries....
If this is the case, you might be able to see it in your NextDNS logs.
Then you can act to whitelist the particular DNS entry.
You definitely have been misinformed about what NextDNS does, and Private DNS in general, this is totally unrelated to DNS.
DNS stands for Domain Name Server, example if you type google.com in a browser, the browser doesn't get what it means, it requires DNS to translate it to an IP address (to connect to the server which provides the website google.com)
This has nothing to do with data usage, DNS barely uses any data in the first place, and does not help you save data used by any applications, NextDNS secures your DNS queries by protecting them against Man-in-the-middle attacks (If you use DNS-over-HTTPS/QUIC/TLS, not for plaintext DNS over IPv6/IPv4), or blocks your selected blocklisted domains, which depend on the blocklists you have enabled in the configuration profiles you have in use.
Your issue is related to the streaming application itself, if you have a complaint to file, you should submit it to the company that the SBS app belongs to.
I'm not sure where SBS is localized nor whether you were watching an on-demand stream or a live stream; quick google searches pull up AU, which I'm assuming is Australia
How much bandwidth does watching a video on SBS On Demand use? – SBS Help Centre
If that matches your locale & app, then there is an important note from their help center (see below)
"Note that some platforms don't allow you to restrict your stream to a particular bitrate. If this is the case, you should assume the Very High (1.5MB/sec) bitrate data usage will apply unless you're watching a live stream."
^ this would roughly be the equivalent of 90MB/min or a tenth of a GB every minute