The iPhone remains mostly functional even when you remove its SIM card.
Although the Apple iPhone is designed to be used in conjunction with a cellular phone and data plan, it's possible to use the device without such a plan and enjoy many of the device's capabilities. Even after canceling your contract and removing your SIM card, several of the iPhone's most important features remain fully functional.
Instructions
1. Tap your iPhone's "Settings" button. Tap "Wi-Fi," then tap the gray "Off" button next to "Wi-Fi." Tap the gray "Off" button next to "Ask to Join Networks" to turn that feature -- which automatically connects you to a wireless network when one is available -- on. This ensures you're connected to the Internet whenever possible, maximizing how often you can take advantage of the iPhone's Internet-dependent features.
2. Listen to music. Even without a SIM card, you can continue syncing the device with iTunes periodically to update the music stored on it.
3. Use the iPhone's camera feature to continue taking pictures -- and, if you use an iPhone 3Gs or 4, videos -- even after you remove the SIM card. Send photos and videos to your contacts via email whenever you're connected to a nearby wireless network.
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