09-29-2012 05:32:08 AM
You must use WiFi (as opposed to mobile data) for this to work.
Also, if you have your own router to which your iPhone connects, I think you're going to need to have it configured as an Access Point, not a router.
09-30-2012 07:46:53 AM
Also if the ecryption on the wireless is not WPA2 only this can cause issues between certain routers and Apple products.