Poor wifi signal after replacing battery.
Hi, I recently replaced my girlfriends faulty battery on her iPhone 4s. I have now realizes that the Wi-Fi signal is extremely poor. Haven't touched any components that weren't involved with the process. I am not sure but there is some sort of grounding tab that goes under the top screw of the battery plate which appears to be loose. Any help would be great,thanks.
Is this a good question?