To all those that have been complaining that they have a strong or marginal signal, but call cannot be completed or voice breaks up etc, when in their home. I have discovered a possible solution. On my 4400, using the travel charger or the automobile charger, while making the call, I have noticed that per the debug menu, the signal is much much sronger. In fact in the past few days I have not had any trouble. Solution can also help if you are away from home and calling from your car. Keep the charger attached while talking. Let me know what you all think and how this works out.