Several users have reported that they are having Wi-Fi connection problems on their iPhone 5. They reported that the iPhone seems to be connected to the Wi-Fi networks but either the internet is very slow or doesn’t connect to the Internet (thus no data transfer) at all.
Possible fixes (please try each tip until your issue is resolved):
- Some users have reported that changing the Wi-Fi channel number fixed their issue. Wi-Fi channels can range from 1 to 11. Try changing your Wi-Fi channels to see if this fixes your issue. Please read your router’s manual if you are unsure how to do so. Apple recommends setting this to “Auto” mode. If your router does not support “Auto” mode, you need to choose a channel manually. Try different channels. Please see this article: Recommended settings for Wi-Fi routers and access points
- Try changing your router security setting on your Wi-Fi to either (a) WPA Personal (b) WEP or (c) WPA TKIP in order to fix this issue. Note that these settings are discouraged because of their security weaknesses.
If this does not work, try the following (please try each tip until your issue is resolved):
- Turn Wi-Fi off and then back on by tapping Settings > Wi-Fi
- Reset your network settings: Settings > General > Reset > Reset Network Settings
- Update your router’s firmware
- Restart your device
- Try turning your router off, waiting 20 seconds and then switching it back on again
- Try resetting your router to factory settings
- Tap “Forget this Network” and then try to connect
- Wi-Fi disabled and greyed out after iOS 6 update on the iPad or iPhone
- iPhone / iPod / iPad will not remember (forget) Wi-Fi passwords
- I can’t connect to the internet. How do I troubleshoot?
- iPad Wi-Fi Problems: Comprehensive List of Fixes