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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.
With an installed signal amplifier we have noticed a significant signal improvement at our working sites. I send you some pictures to show the installation we've made.