Published Android apk gives error “Package file was not signed correctly”

Question

I recently uploaded my application to the android market however it\'s refusing to run when downloaded due to the error

Package file was not signed co

Answer 1

This error usually occurs because you are trying to push an update which was signed with a different key than you used in the initial submission. You need to find the key you used the first time you published the application and use this to sign the update.