If you use Verizon as the carrier for your mobile phone, you may be noticing a degradation in service. The Verizon cell tower that services the Carbonera neighborhood is inadequate. It has been inadequate for years. Another tower is required or better signal amplification for the existing tower.
However, as of July 2017, there's a new problem. One (or more) of the radios have gone out in the cell tower, so that most subscribers are getting only one band (or one dot) of signal. This means very poor reception and dropped calls.
Please contact Verizon and complain. They tend to be slow to respond unless there's a large group demanding action.