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Hello there! At last I've found some spare minutes to ask you about dual band boosters. The most interesting thing is that I have rather good cell and Internet connection at home, so have no clear reasons for getting it better. But sometimes I have a permanent missing of GSM and 3G signal. Such a situation lasts for some hours and after that completely disappears to reappear next day.
The signal in our office used to be rather unstable. And our carrier could not help us. So we decided not to waste time and to resolve the problem on our own by getting a mobile repeater. The obtained results exceeded our expectations. I send you a few images for your reference.