1) Disable Wi-Fi networking service
Many iOS 8 customers stated that they fastened their Wi-Fi points by disabling Wi-Fi networking service, you may give it a attempt by going to Settings > Privacy > Location Services > System Services. This solely pertains to your location getting used for Wi-Fi Networking, so it doesn’t disable Wi-Fi totally.
If the above answer did not work with you, higher to attempt reseting your Wi-Fi community settings.. Almost all networking associated points I've skilled have been fastened after resetting community settings.
Here's tips on how to reset it: To reset community settings, open the Settings app and navigate to Settings > General > Reset and faucet on Reset Network Settings.
Often occasions, in case your ISPs DNS servers are having issues, you possibly can change to Google DNS or OpenDNS. You can comply with the directions within the publish linked under to vary your DNS settings.
Now if all the above ideas did not work with you, we advocate you to make a fast restore on your system and setup it as a brand new iPhone, perhaps restoring will repair this drawback..
Let us know within the feedback in case you confronted any Wi-Fi points, and in that case, have been you capable of repair the problems with the following pointers.