There is a signature error in the upgrade of vivo Y5 1 mobile phone, which can be solved in the following ways:

You can try to press and hold the power button for 30 seconds to forcibly restart the phone.

Please also go to Mobile File Management-Mobile Phone Storage-Search, Download and Delete, then switch to another WiFi network or data network, and re-enter Mobile Phone Settings-System Upgrade to check the updates.

If this phenomenon still occurs, it is recommended to try to find the system upgrade download manager and clear the data in mobile phone settings-more settings-applications.

The specific steps to delete a folder are as follows:

1. Find file management on the mobile phone desktop.

2. Enter the file management, and click all files/mobile phone storage.

3. Try to delete all the downloads in the file/phone storage.

The specific steps to clear the system upgrade data are as follows:

1. Find the settings icon on the mobile phone desktop and enter the settings.

2. Enter the setting interface and click More Settings.

3. Select the application option in More Settings.

4. Click All in the application interface.

5. Try to find the system upgrade and download manager to clear all data.