Iphone 5 Wifi problem

have an Ipad2 and an iPhone5. My two devices are on 6.1 and kind to the room and the router in the room ta ... Here in room wifi ipad and more powerful than the iphone 5 ... Sometimes the iphone wifi drops some ... I used that speedtest app on both the handle while the ipad internet iphone 4 megs takes only 500 kbps ... If I get close to the router there is the usual iphone