There may be instances where you find yourself unable to connect to your wireless network, such as after you have changed the wireless password on your router.
In some cases, you may need to remove the wireless connection from your iPhone, and reconnect.
To accomplish this, follow these steps:
1. Tap Settings:
2. Tap Wi-Fi:
3. Tap the Wi-Fi network you wish to remove:
4. Tap Forget this Network:
5. To remove the network, tap Remove:
6. You may now reconnect to your wireless network.