I have very poor signal at home with multiple phones. I have called many times without a resolution. I received a network extender and that doesn't work very well even though it shows full bars. The other person on the line hears every other word, even when standing right next to the extender. Without the extender, there is no signal at all. I live in the middle of the city in Houston, not a small town. This is unacceptable and why can't I receive a solution?