Why wifi doesn't work??

[Android Central Question]

So,I have samsung galaxy grand duos.Old phone and i have wifi in my house it's 60mbps.My phone recently only get 5mbps.On other phones internet is much better,40 mbps.Can someone explain how to fix that please?This is not the thing only with my house wifi,every other wifi looks like it's not working
Thank You

 

[B. Diddy]

Welcome to Android Central! See this guide: http://forums.androidcentral.com/am...roubleshooting-wi-fi-connection-problems.html