This is an amazing and powerful 3G signal booster to cater to your week signal needs. If your antenna picks up the outside signal of even 1 bar, this beast is here to amplify the signal to steady 5 bars. 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 a range of networks and 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. Make sure you will never miss a call again.