Low Wi-Fi signal once screen change in iPhone 4

[B-P-ti]

I found this problem after a few screen changes. Actually problem is that after changing the screen some of the times I noticed that the wifi signal is weak and I am not able to access the wifi unless I am very close to the router. Is there someone who is having any idea that why this is happening to me and how can this be resolved?

[Algonkin]

Have you changed the back cover of that? Please reply with this as this can be one of the reasons for this problem.

[Illinois]

I think that reconfiguring the router will resolve the problem for you. So you can try to do that and reply back if this is helpful for you. There are many chances that you will be out of the issue after that.

[Odalis]

It might not be the problem with the iPhone. The Wifi signal available on the area where you are using that itself be weak. Check it on other WiFi enabled devices.