National Aircraft War update failed _ National aircraft update download failed to solve the tutorial

If we are to update the National Aircraft War failure, we can refer to the following methods to solve it

Failure reason one:

If you are downloading to the cell phone SD card and our SD card memory is not enough, this will also appear the update download failure problem.

Solution:

Remove part of the software and free up memory space.

Failure reason two:

(primarily for Android users): The original version of the "National Aircraft War" in SD card has not been fully understood.

Solution:

The solution is to find the relevant files in the SD card we delete this and then download the new version.