I have 2 wireless data cards. One is Huawei, D-Link manufacturer's. But inside home no signals coming. Once coming signals have 3G. Immediately converted 2G but web pages not coming at that time. I want to data service unit to amplify signals, Signal interference also rectify, electrical interference also rectify equipment needed for common 2 data cards. One data card using Airtel, another data card have using BSNL SIMs now.