Toh shyad uss particular samay pe off honge sare routers ... maybe maintenance etc reason hoga ... bcz jis din router install kiye ja rhe the usi din maine trial ke waqt ek speed test liya tha aur sbse pehle gkp jn pe wifi use kiya tha ... jaha tak mere survey ki baat hai, at least pf ke kone kone me wifi strength ki availability rhti h