What way are you trying to view coords? I'd use the built-in or Opera Mini browser and either look at the full website or the WAP version. You should have your data package on your plan however...
I use Opera Mini to view either the geocaching.com, or geocaching live, or Wap.geocaching.com websites. I have not found a way to directly use the coordinates with the Sprint nav program. There just isn't a way to enter it.
I just enter the coord by hand (if I haven't pre-downloaded to my GPSr).
You might try the "add to telenav" links:
http://www.telenav.com/TNcom/addrAdd.do?
If you figure it out I'd like to know.