I frequently stop in Castle Rock, Colorado on my way up to Denver with my wife and shop at the massive Outlet mall there right off exit 184. This is literally right off I-25, just miles away from a major metropolitan city. Castle Rock itself is a decent sized town too. I barely get 3G when walking around the mall, and I usually lose signal altogether when inside most of the stores (it is an outdoor mall). I thought after a while this would be fixed, as this place is VERY busy all the time, with many shoppers going there, but I've lived here for almost 3 years now, have had 3 different Verizon phones (S3, iPhone 5, now iPhone 6) and still have the same problem, as does my wife with her old Razr and now iPhone 6 as well. I'll give Verizon credit, the mall is kind of down in a hole pretty far below elevation from the interstate, but still, I can HEAR the cars going by I-25 as I walk around there.
Please fix this! It is very annoying to have to go shopping with my wife and being unable to browse my phone due to shear boredom...LOL