What can interfere with the installation of an application on Android?

Question

Android

I'm building my first Android app. I create on Cordova, but I don't think it matters. I send it to the customer for testing step by step. The first option was sent without a signature. didn't know about her. This option was installed normally by the customer. The following application instances are not installed. It says "Application not installed". I already sign the application, it disables Google Play Protection (it interfered on my smartphone). Tell me, please, what else can interfere with the installation? He cannot do a reset since the smartphone is corporate.

Answer 1

I honestly don’t know how applications are created and signed in Cordova, but maybe you need to check that the application supports old phones, for example, in android studio, when signing an application, you need to select jar signature + full apk signature, it helped me in android studio the problem was the same as yours. I can also advise your customer to remove the debug version of the application before installing the release version of the application.