You need:

• a supported phone, and
• a data plan (or equivalent network plan if outside of US), and
  
• The AccuTracking software has to be installed and running on the phone.
  

Data Plan Details:

Data plan is required because the phone needs to send out the GPS data to our servers so you can view them online in real time. For details of how AccuTracking works, please see here.

• For regular Nextel phones: unlimited data access plan;
• For Boost Mobile phones: "Wireless Web Features" (the "35 cents per day" feature) need to be activated. You can add that when activating the phone;
• For Blackberry: a data plan with direct TCP;
• For Windows Mobile phones, you need an "Internet" plan.
  

If GPS is blocked on your phone, AccuTracking won't be able to get location information. On your phone press the menu button, select "GPS"->"Privacy"->"Unrestricted" (on i730/i830/i860/i710: "More..."->"GPS"->"Privacy"->"Unrestricted"). This will allow Java programs to access the GPS chipset.

Take the phone to an open area with a good view of sky. GPS usually doesn't work indoors and doesn't work well in downtown streets surrounded by high buildings.