What is the reason why the virtual bus card handled by Huawei mobile phone is often unusable and how

It could be a Huawei phone.

The system needs to be upgraded, and the steps to upgrade the system are as follows:

1. Back up personal information and ensure that the battery is sufficient; In order to avoid the data being cleared after successful flashing;

at the root of the directory;

Fourth, the mobile phone enters the third-party recovery (different models, the method of entry is not the same, the specific entry method can be as follows), as shown below; (Note: The operation mode under the recovery interface: the general volume button is moved up and down.)

The power button is the confirmation button. Some recovery supports click-to-touch operation. Below I will show you the recovery of the button);

5. After entering the recovery, double clear the phone in turn; Move and select [Erase All Data] (Note: Individual recovery is to empty data and restore factory settings.)

The power button confirms the entry, and then moves to select [Yes - Erase All Data];

6. Return to the main interface of recovery, move and select [Clear Cache Data] (Note: individual recovery is to clear the cache partition) power button to confirm the entry, and then move and select [Yes - Clear Cache], as shown in the following figure;

7. After the double clearing is completed, return to the main interface of recovery, select the flashing package to install the phone, move and select the power button of [Install Flashing Package from SD Card] to confirm the entry, and then select [Select the zip file from SD card].

Power button to confirm entry (Note: If you are placing the flashing package on an external SD card, please select [Select Zip File from External SD Card]), and then find the flashing package (.) that you just copied to the root directory of the SD cardzip format), and then the power button confirms to flash in, as shown below;

8. After the flashing package is completed, return to the main interface of recovery and select [Restart System Now], as shown below;

HUAWEI mobile phone flashed successfully!!

Note: Before flashing, be sure to back up your personal information in case the data is cleared after the flashing is completed; After the flashing is completed, the first boot will be slower, please be patient.

Make sure that the card reading is aligned with the sensing position of the NFC of the mobile phone, and adjust the card calling position in time when it is not sensitive or unresponsive. It is recommended that Tan Chong place the card vertically, and change the NFC area of the mobile phone to the middle of the card.

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After that, pull down to open the status bar and click the NFC icon to open the NFC function.

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After that, put the transportation card on the back of the mobile phone, and scan it to prompt a pop-up window to select the Shanghai transportation card.

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Click on NFC to deposit when the reading is complete.

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After entering the deposit page, select the deposit amount.

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