How to set the upper limit of mobile phone traffic?

On the desktop of the mobile phone system, find and click the settings icon to open it. How to open the limit of mobile phone traffic? Next, demonstrate the operation steps.

2. On the desktop of the mobile phone system, find and click the settings icon to open it. In the "Settings" management window, find and click the option of dual card and mobile network to open. In the "Dual Card and Mobile Network" management window, find and click the traffic management option to open it. In the Traffic Management window, click the settings icon in the upper right corner to open it. In the Settings management window, find and click the traffic restriction option to open. In the "Traffic Usage Limit" setting window, activate the daily traffic usage limit and monthly traffic usage limit options, set the value of "Run after exceeding", disconnect the network and remind the options to be completed.