I have an LG G3 phone. I was getting short battery life with the original battery, so I figured I needed a new battery. I bought an extended-life battery (a TQTHL). This battery, being much thicker than the original, doesn't fit the metallic back of the phone, so the phone uses a "Soft TPU Full Edge Protection Case" and not the original back of the phone. I know the phone doesn't have NFC functionality with the new battery, so I wondered if the back of the case is essentially part of the phone's antenna. I doubt Verizon had a cell tower go down, so could this be why I have much less phone call functionality with the new battery -- I have to move next to a window, or even go outside, to have a conversation over the phone?