Hello, guys I've a BSNL Broadband connection and ZTE-ZXDSL-531B router wifi modem that comes with BSNL. The problem is that the signal drops after moving 10 feet plus. So, I planned to spend money on a modem which should perform high range of connectivity, with at least two antennas. My budget is not sure but I want pure performance, it should not be expensive and issues. Also I'm kinda newbie in networking so I need a guide to set password protection for wifi. As I searched on internet market, I saw D-Link DSL-2750U, I want to how it is? Is it compatible with USB portable HDD to download torrents and how? And what is the difference between 150mbps or 300mbps modem? I've 4Mbps connection.