If you want to install any game or application on your android phone, then you must have got an .apk file for it. Here’s the procedure to install the .apk file on your android phone.
1. Download and install the App Installer app from the android marketplace.
2. Copy the .apk file on your SD memory card, and insert this card on your android phone.
3. Now you will see the .apk file in App Installer app.
4. Just click on the .apk file to start the installation, and follow on screen instruction to complete the installation of the .apk file.