In downtown milwauke the sprint signal can change from full bars to 0 bars block by block. That's just the nature of high rise buildings. You can easily be in the shadow of a building. Until this week I was downtown every weekday picking up packages. I worked after 5pm and had 30 stops. I had usable signal almost everywhere except during the summer festivals. I have seen improvements over the past 6 months and its only going to get better.