We have a Suresignal (SS) because the VF cell signal was pretty poor for a while. Upgrades have seen the signal boosted on 3G to 3 or 4 dots depending where in the house you are.

My wife has been complaining of awful call quality (iPhone 6 to iPhone 6 +) when I am at home and she is working in Auckland. She is home for the weekend so we did an experiment.

With the SS unplugged, call quality is just fine.

As soon as it is plugged in and in use, the quality goes to hell.

Any idea why?