Most Android devices default to the Google Play Store for downloading and installing apps, but it's far from the only place ...

However, there are other methods to install user apps as system apps without paying fees. Check out this guide for methods of installing ordinary user apps as system apps.

In general, you should install apps outside of your phone's app store only if you have a very good reason to.

The Android Market holds a lot of useful Android apps for a variety of Android devices. Some of the apps on the Android Market, however, are incompatible with some handset models.

Installing unauthorized apps is a more involved process than it is on Android, and it comes with a few more limitations.