iPhonefreak

Here’s a simple iPhone trick that could be very useful when you want to access many different Wi-Fi Networks. If you’re in an airport or a coffee shop and you can’t access the hotspot, the first thing you should do is try to renew your DHCP lease.

To do so, go to "Settings > Wi-Fi" Networks and pick the network. In the DHCP panel, select the "Renew Lease" button.  In many cases, this should re-establish a Wi-Fi connection.

If it looks like you’re connected on the Wi-Fi network and every time you access a webpage it uses the Edge network, it might be related to a bad WEP password. To solve this, go to "Settings > Wi-Fi" and tap "More Info" next to the Wi-Fi network name and tap Forget this Network. Then try to make a new connection to this Wi-Fi network again.