For the last month, signal has degraded to the point of making calls or using data on smartphones in downtown Columbia, SC is nearly impossible. I work for a company with a Verizon account. Nearly all of us are experiencing this degrading of service. The service does not improve until we get outside of the city limits. The signal strength stays around -113 dBm. All of our phones are basically unusable while we are at work. Seriously considering changing our contracts.