My 4G data speed has been dropping consistently declining for some time now. I was previously getting 8+ Mbps and I am currently at ~3. As a long time Verizon customer, I used to be able to say I never had any service issues, but now, I barely get 2 bars of 3G at the office, and never get the speed I would get even a year ago. I have not moved, and am currently using the Samsung Galaxy S 6. My last phone was the Samsung Galaxy S 4. Why is my 4G speed consistently getting slower and slower?