Share Your IPhone as a Wi-Fi Hotspot
IPhones running iOS 4.3 and higher allow users to share cellular data connection with other device through Wi-Fi hotspot, USB and Bluetooth.
In this article, mainly talks about how to share iPhone 4s as a Wi-Fi hotspot, so that your other device (like iPad, laptop, tablet or other smart phone) can go online from your Wi-Fi hotspot wirelessly.
Step as follow:
Step 1: Tap "Settings" on your iPhone home screen.
Step 2: Tap "General", and choose "Network" on the Settings screen.
Step 3: "Enable 3G" network, and turn on "Cellular Data" on the network screen.
Step 4: Go back to the "Settings" screen choose the "Personal Hotspot".
Step 5: Turn on the Personal Hotspot, and tap Wi-Fi Password to set change the default password to prevent other unauthorized devices connecting to your network.