What do iPhone users want most? According to the results of a survey released today, the top four things that U.S. iPhone users want most are already available from Google's Android.

The survey, conducted by interactive research firm Vision Critical, lists a choice of wireless network (39 percent) as the number one thing that smartphone buyers in the U.S. would most like to have in the Apple iPhone. Android devices, of course, are available across multiple wireless carriers while the iPhone can only be used (without jailbreaking) on AT&T in the U.S.

Also on the list:

A 4G Network (38 percent): HTC's Evo 4G for Sprint has hit the market, even if 4G service by Sprint isn't widespread yet.

An 8-megapixel camera (33 percent): HTC's Evo 4G and Droid Incredible both have 8-megapixel cameras.

FM Radio Tuner (30 percent): Yup, Android has one already.

Interestingly enough, the headline on this survey was centered around the desire for an FM tuner, especially in Canada, where that was the number one item on the iPhone wishlist. Royalty agreements have kept Pandora and Spotify, streaming music services that are big in the U.S. and U.K., off of the devices of Canadian customers.

There have been rumors of Apple enabling a dormant FM Tuner on the iPhone and iPod Touch, but it still hasn't been turned on. When and if Apple ever does announce an FM tuner for the device, the company is sure to get cheers for offering something that others have already been offering - just as iPhone enthusiasts have cheered for things like tethering, MMS support and cut-and-paste in the past.

Those things weren't new when Apple announced them. They were just new for the iPhone. Here's the full wishlist from Vision Critical: