The outdoor antenna supplied as standard may not always produce optimum results. This is usually the case if the mobile phone signal around the building is not strong enough. We recommend upgrading the outdoor antenna to increase the input signal to the required standard.
If you know the location of the mobile phone mast and can align the antenna to it, you could opt for a directional antenna. If alignment is difficult or not possible at all, then we would advise you to purchase the high-gain omnidirectional outdoor antenna.