How to create ad-hoc network from iOS

I'm looking for info on how to programmatically create an ad-hoc network from within an app on an iOS device. I've heard that this is possible in 4.3 with the hotspot feature but I'm not lookin开发者_Go百科g to tether.

I'm also open to options involving jailbreaking and private APIs on devices that don't support 4.3 (iPhone 3G).

Bluetooth is not an option for my usage.

Thanks

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I believe it depends on your carrier to allow this configuration or not.

If your carriers does allow, you could find it at

Settings -> General -> Network -> Personal Hotspot