Why can't Huawei mobile phones scan the code with their own traffic after the system is updated?

Huawei's mobile phone system can't scan the code with its own traffic after being updated. It may be a problem with the sim card or the mobile phone system.

1. If the data service cannot access the Internet, it is necessary to confirm whether the SIM card is recognized and whether the standard SIM card is used. If you cut the card manually, it is recommended to change the SIM card in the business hall and try again.

2. Confirm whether the mobile data switch is turned on. Slide down from the status bar to check whether the mobile data switch is turned on.

3. If the sim card and mobile data are ok, it is still inaccessible. It is recommended to restart the phone and try again. If it cannot be restored to normal after restarting, it is recommended to back up the data, try to restore the factory settings or upgrade the system software.