It doesn't meet your needs and failed for you. Return it as unsuitable for your use.
Bought a new iPad Mini. Using wi-fi at home, I found that the signal began to deteriorate at about 15 feet ... one wall between ... I took it to Genius Bar ... they told me everything was normal. My MacBook Air works fine in all positions in my house and near the house. At the moment, I don't believe the "Genius" ... any suggestions? My router is a relatively new Mac Time Machine.