Go to Settings > Wi-Fi, and make sure Wi-Fi is turned on. Tap the name of the secure Wi-Fi network you want to join. Enter the password for the secure Wi-Fi network, then tap Join. If you can't tap Join, the password you've entered is incorrect. Edit: if you're not home. You will need to purchase a data plan with your cell phone provider.
If you paid for 3g or similar, it would connect automatically.
What if I am not home w ith my WIFI how do I use internet on my IPAD
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