adb uninstall failed

Question

I am writing some sample apps.
After I debug these apps, I don\'t see an uninstall button in my device\'s application management.
When I do adb uninstall, it always

Answer 1

Maybe you're trying to uninstall an app that is a phone administrator.

To be able to uninstall it, go to Seetings > Security > Phone Administrators. If the app is listed, uncheck it and confirm the operation.

After that, you should be able to uninstall it using the App settings area or adb.