Two years ago I canceled Sprint because I moved and got no signal at my new home. So I went to the sprint store today to see if the have coverage in my area, so I could get the 600. Nope, still no coverage. I guess it is Tmobile or AT&T.
I am only 10 miles from Philadelphia too. I am shocked they don't have coverage by me.

This is actually a very good way to find where coverage is, just tell them to plug in any zipcode. Much better than the confusing map on the website.