To connect your iPhone to a Wi-Fi network, follow the steps below.
Turn on Wi-Fi:
Choose Settings > Wi-Fi and turn Wi-Fi on.
Join a Wi-Fi network:
Choose Settings > Wi-Fi, wait a moment as iPhone detects networks in range,
then select a network (fees may apply to join some Wi-Fi networks). If
necessary, enter a password and tap Join (networks that require a password
appear with a lock icon).
Once you join a Wi-Fi network manually, iPhone automatically connects to it
whenever the network is in range. If more than one previously used network is
in range, iPhone joins the one last used.
When iPhone is connected to a Wi-Fi network, the Wi-Fi icon in the status bar
at the top of the screen shows the connection strength. The more bars you see,
the stronger the connection.
When you leave the Wi-Fi hotspot area, your voice calls are not impacted. The data session will pause and automatically reinitiate on the Sprint 3G Network.
Example: Talking to a friend while Google searching for 'Restaurants' on
Wi-Fi. Leave the hotspot area. The phone call will continue. The Google search
results will remain simply re-launch the browser.
Wi-Fi is secure when using a secure (password protected) hotspot, but there is no data security when using an open, unsecured Wi-Fi hotspot unless you are running VPN software, which encrypts the data.