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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.
Best of the best, word is not enough to describe how happy i am with this device! my house is not very big so i was recommended to buy this model AT400. i had very low signal, i couldn't make even a call.. i used to miss a lot of calls. it was a real disaster.