Sprint is trying to make it easier for so-called voice-centric users -- those of us who use our phones primarily to make phone calls -- to access its On Demand and Power Vision services. The company is employing and testing new dynamic graphical interfaces and services that will update their content automatically to match your passions for football, sitcoms, or poker or dieting, you name it. Many of the services also take advantage of the GPS transponder included in virtually all new cellphones. The Sprint services are aimed squarely at baby boomers and young adults, which the company sees as part of a vast, untapped market for its multimedia products.

One of the latest is Recently Sold Homes, which shoppers can use to instantly find sale prices and sale dates for properties in the area they are in, which the service determines based on the GPS coordinates of the cellphone. Recently Sold Homes also tells you the square footage and taxes on each of the homes sold within the last three years.

Even if you're not in the market for a new home, you can quickly satisfy your curiosity about the home values in that ritzy neighborhood you find yourself driving through on your long weekend on the Vineyard.

Many grownups this summer are also trying to keep track of their offspring and older family members. If you have a teen or ``tween" who likes to explore the woods or (gasp) the city on their summer days off, you can track their phone from your own phone or the Web with Sprint's Family Locator.

But even if boomers and others ``on the sidelines" find the Sprint services compelling, they will not sign up unless the process is more intuitive, said Sprint product manager John Burris.

Sprint, which last week said it plans a high-speed G4 cellular network, will be testing prototype interfaces for its add-on services in a few months, Burris said.