Huawei Glory 7 Can't install unofficial software how to solve

1, in the Mobile interface we click "Huawei Glory 7" into the after we click "Settings" and then we click on it to open into

2, open into the settings and click the "Security" option as shown in the following figure

3, we can see there is an unknown source, we open it

4, and then open the dialog box, there will be a description of what the risk of anything, we do not click "OK".

OK, so we can install the non-Huawei Glory 7 official software again, you go to try it, other Android phones are the same.