1. Ensure your iPhone is within range of the router.
2. Ensure the router is not surrounded by large solid objects which can block the signal.
3. Having a router in a different room could cause an intermittent signal.
4. Installing a router near cordless phones or microwaves can interrupt the Wi-Fi signal.
5. Touch Settings.
6. Touch Wi-Fi.
7. Touch the information icon.
8. Touch Forget This Network.
9. Touch Forget.
10. To reconnect, touch the desired Wi-Fi name.
11. Enter the network password, then touch join.
12. You are now connected to the Wi-Fi network.