I purchased a new iPhone 6 last spring and all was well most of the time. I had a few dropped calls but that was all until sometime in October. I can no long make calls or receive calls at home without them constantly being dropped. We do live in a rural area but purchased a cell phone booster a few years ago. The booster has given us 4 bars (-80 to -90) consistently. In fact my husband who has not upgraded his phone gets perfect cell service here at home. Where my phone was dropping calls mainly at our home has now starated dropping calls everywhere. I have changed my setting to have my phone go through my wifi at home and limiting LTE that I read about on a help page. I'm paying for a phone and cell service but getting frustrated instead. How can I get my calls to stop dropping?