Connect your phone via USB, then from your android-sdks/platform-tools directory (on windows, usually c:/users//android-sdks/platform-tools), use the adb install command:

[code]
adb install "C:/path/to/your/File.apk"
[/code]

That’s it. Assuming File.apk exists at the path provided, you’ll see it listed in your Applications list and be able to use it immediately.