Scroll to the bottom and select (or System and update ). Tap System update .
: Addresses slow performance and system lag that may develop over time. zte blade v40 design firmware fixed
Select . If a new version is available, follow the on-screen prompts to download and install it. Scroll to the bottom and select (or System and update )
If your phone is "bricked" (unresponsive) or stuck in a boot loop, you may need to manually flash the stock ROM. How to update the system? - Support zte blade v40 design firmware fixed
The safest way to ensure your firmware is "fixed" with the latest patches is through the built-in system update tool: Open the app.