Why is the Internet speed so slow when the Dawang card is plugged into the mobile phone? Why can't you get a short message when you call 100 1? They are all made of Unicom cards.

If the mobile phone uses mobile data to surf the Internet slowly, please solve it as follows:

1. The phone is turned off and restarted.

2. Clear the history and cache of mobile phone surfing: Apply-surf the Internet-click the five-pointed star icon on the screen-History-Menu button-Clear the history.

3. This situation may be caused by a problem with the Internet application, so it is recommended to reset the browser settings. Operation: Applications-Internet-Menu Keys-Settings-Content Settings-Reset Settings.

4. If the problem cannot be solved after the above operation, it is recommended that you try to replace another SIM/USIM card.