According to that map, the tower down the road from me is designated a "1" (the legend indicates "voice upgrades"). I get a very strong signal as I pass the tower. Today my wife had the phone in the car while I drove and she read off the dB levels. Upper -60s were the readings as we passed north and south of the tower.
I must say that coverage on the roads is seamless though. I had a conversation that took me through three towns, a car wash, inside stores, and never dropped the call or had it get degraded intelligability. The ONLY place where the phone does not work is at the house.
Noticed another interesting thing. The other day when I measured, it was raining and I had 1 bar at the roof and in the yard. Today it was dry and cold and I had 3 bars in the yard. I even had 1 bar in the front of the house, where all glass windows are facing the tower and was able to continue the call for a bit.
My hope is that they do indeed utilize the 800MHz CDMA capabilities of the LG 730 and give me good service again. 1900MHz is literally line of sight. If you have ANY obstructions at all between you and the tower, you don't get a signal. With the iDEN, the 816Mhz fared MUCH better, even penetrating dense forest.
Sprint is improving, but has a way to go at my house. We've ordered a Wilson dB Pro cell booster and antenna kit. I think it's the only solution that will enable me to use the phone in the house.