It's the only choice on my iPhone 4, I didn't change any settings from when I transferred my stuff from the 3Gs to the 4, and I had it to an hour on my 3Gs. I did google the problem and I saw that people were having problems because they connected it to their Microsoft Exchange account, but I don't use that, I just connect it through Gmail. I even deleted both Gmail accounts to see if that would do anything but nope, immediate was still the only choice.