birthday call simulation game. birthday pictures and greeting sounds.
select picture from image gallery and greeting voice.
you can change the caller name and number.
simulate incoming call for birthday greeting.
options to reject or accept call.
self calling to your device only.

Make sure that third-party apps are allowed on your device: go to Menu->Settings->Security-> and check "Unknown Sources"

Tap the APK file. Allow the app any required permissions it asks for. Then, at the bottom of the installer window, click INSTALL.

You'll see a confirmation the app is installed. Now you'll see the app available in your list of installed apps.