Why does China Mobile use more than 1G for sending me short messages when I use more than 400 m traffic in my mobile phone settings?

The flow calculation set by 1 is basically not very accurate. The online traffic of some software is not calculated, only the traffic of foreground software is calculated, and the background traffic of some software is not calculated.

If you suspect that there is something wrong with China Mobile's traffic calculation, you can log in to China Mobile's online business hall, and you can find a detailed list of traffic and billing, including how much traffic you consumed on what date and when, accurate to seconds and kb, and compare it with your own usage habits and conditions.

If you still have questions, you can actually test it yourself, close all background programs, open the browser, and then download this picture. You can check the actual size of this picture in the picture properties, generally calculated in KB or MB, remember the time, and then log in to the online business hall of China Mobile to see whether the traffic consumption at the same time is consistent with the size of this picture. If the consistent traffic calculation is correct, if not, you can call China Mobile Customer Service Phone 10088.