Make sure that you have a working Internet connection, check with your operator for details.
Locago should work on most Java MIDP 2.0 CLDC 1.1 compliant devices with a color screen and at least 1.5 MB free heap space. Please feel free to try it on other phones, just let us know if it works. For a complete list of supported phones check this page.
If you run into problems please go to the Help page where you find answers to the most common problems.