Airport extreme having poor range
So a few months ago I bought an Airport Extreme to extend our old router range. The speed of the internet is great but the range is poorm when sitting in the living room 10 meters away from the A.E. iPhones, iPads, HTC phones and Samsung phones have really poor connection and it keeps dropping. My macbook pro has a good connection though, but when sitting upstairs it drops connection so now and then, mainly during Skype. Does anyone know if I can optimize the settings of the A.E. so i've got better range?
Airport Extreme 802.11ac, iOS 7.0.4