Why does OPPO mobile phone prompt that traffic usage has reached the speed limit?

Hello, I received a reminder in the drop-down notification bar, such as "the current network card traffic has reached the speed limit", because the mobile phone automatically detected that your current Internet access speed is slow (there are many reasons for the slow network speed, such as the current poor signal or other reasons), and the mobile phone system speculated that this reminder might appear because your mobile phone has reached the monthly traffic limit.

Please rest assured that OPPO mobile phones will not and have no right to limit your traffic speed. If you contact the operator to verify that there is no speed limit, you can ignore this prompt and we will continue to optimize the algorithm. We are deeply sorry for the inconvenience.