This 3G signal booster is specifically designed to pick up weak signals and amplify at your place. It operates within the 2100MHz network frequency. It has network coverage of 1-2 rooms, meaning it is suitable for small offices, apartments and boats. The best part is that it works with major operators in the UK, like O2, EE, Three, Orange, Vodafone, T-Mobile, Virgin, BT so you don't have to fret when you switch between mobile operators. This standard version of 3G booster ensures your devices get up to 5 bars of signal, in case you catch 4-5 bars of original signal outside. Don’t pine after voice clarity, have it.