This started happening a few months ago. My service at my house was perfect. Then it started getting bad. I used to average 4-5 bars. Now all of a sudden it's 2-3. Sometimes even no service. I've swapped SIM cards and tried my SIM card (mine and someone else's) in a fresh new iPhone 6. The problem still persists. Could there be a cell tower issue on my area? I'd also like to note that no other carrier nor phone on the same carrier has the same issue. I haven't tested a different iPhone at my house yet.