For the past 3-4 months, my iphone 7 has consistently dropped calls in a 10-15 mile stretch on U.S. Hwy 431 between zip codes 36027 and 36310. I used to get great service here and there are several towers in that area however I'm unsure if they are supported by Verizon. Yesterday I had a total of 7 calls dropped and sometimes it will say "No Service". Other customers are having the same problem however it seems to be more people with iphones. Just curious to what happened and if anyone knows what can fix it.