Re-installation failed due to different application signatures

Solution 1:

It happens because keystores on your laptop and original pc are different. it's called debug.keystrore and located in %USER_HOME%/.android/ folder. TO be more specific it happens because eclipse tries to push apk with reinstall key. So you have two options

1. Share debug.keystore between various development pc's
2. Manually uninstall your apk from device ( using adb )

Solution 2:

I also got the same problem and fixed it. you should do the following to fix it,

1. Uninstall the application from your mobile if you load it already.

2. To uninstall goto settings->application->manage application.

3. Run the application again and choose the mobile

Hope this will help you

Solution 3:

After you copy debug.keystore to your PC, you need to rebuild project on PC.