When some mobile phone applications need picture verification or Huawei mobile phone system needs you to unlock or perform verification, it will appear, indicating that the password or picture password is wrong.

You can force a firmware update as follows:

Go to Huawei mobile phone official website and get the upgrade package of the corresponding model of the mobile phone.

Prepare a memory card (preferably empty, 1G or above) to ensure that you can read and write.

Expand the downloaded firmware upgrade package and put the app file in the following directory of the memory card: dload\UPDATE. app; application

When the mobile phone is turned off, insert the memory card and press the volume up key+volume down key+on/off key at the same time, the mobile phone will automatically enter the upgrade mode and then start the upgrade.

When the progress bar is full, the phone will automatically restart. If not, please remove the battery manually.

This is usually enough. Note that the original contents in the memory card should be backed up in advance.