The 4G signal booster is specifically designed to pick up weak signals. It operates within the 800MHz network frequency. It has network coverage of 1-2 rooms, meaning it is suitable for small offices and apartments. The best part is that it works with a range of networks and major operators in the UK, like EE, Vodafone, Tesco Mobile, Giff Gaff, O2, BT, TalkTalk and Three. Thus, you don't have to fret when you switch between mobile operators. If your antenna picks up 3-4 bars outside, we guarantees a steady 5 bar signal with our standard model of 4G booster. Don’t pine after voice clarity, have it.