Yesterday I moved the antenna (flat panel type) from its temporary home in the loft to outside on the gable end of the house. The height and direction of the antenna is the same as in the loft ? but now without the brick wall in between it and the O2 mast. The signal strength in the house is now much stronger ? 5 bars (iphone) virtually throughout the house! So, I?m more than happy. Excellent product! Thanks your your help.