Wi-Fi not functioning? (IOS 7.1)

CAUSES

- Outdated router firmware

- Incorrect router channel settings

- Low/Unavailable wi-fi network coverage

SOLUTION

- Toggle the 'Airplane mode' option between ON & OFF then try reconnecting to the wifi

- Turn OFF router then switch it back ON

- Reset the network settings via Settings>General>Reset>Reset Network settings then set up a new wifi network

- Try changing the router's channel

- Ensure the router's firmware is updated

- Perform a factory reset