"App not installed"

Dear all,

I am very new with Unity. Recently, I have an issue regarding the installation of apk file. I tried with various method and searched in the forum but still could not figured out.

Let me briefly describe the issue. I have two computers, let's say A and B and two android phones Y (Android 6.0.1) and Z (Android 5). Both computers have the same installation Unity 5.5.2f1. I have one project in computer A. The apk built in computer A can be installed both phone Y and Z without any issue. However, the same project when I copied and built in computer B, I can only installed successfully in Z phone. The Y phone show the message "App not installed".

I had tried many ways already such as re-creating keystore, changing player settings, changing Android API level, updating jdk. All of this method didn't solve my issue.

Any help?
Thank you,

 

Hello, Finally I solved it by uninstalling the old app and do new installation. I think maybe because of different apk signature.

 

I have the same problem i do a clone of my game but with diferent charecter and ehen i try to install apk i can't. I try change the app build name, keys, do another project and export assets. But nothing runs. U can solve?