If i have an unlocked iphone 4 can i update to the IOS 7?

If i have an unlocked iphone 4 can i update to the IOS 7?

Yes. I have a factory unlocked iphone 4 and i was successfully able to run ios 7 beta 1, 2, 3, 4, 5, and 6.

It does run slow though, that is the reason why i downgraded back to ios 6.1.3, because it is much faster and has less bugs. I hope that tomorrow (sept 10) will be the release of the gm (gold master, basically the same as the one going to be release but a week or so earlier for developers) version of ios7 and it will be much better, if not i'm keeping my iphone 4 on ios 6.1.3.

Sorry i went into such detail.

Yes. It won't be released to the public until late September at the earliest, but you can install it now if you register your device's UDID with a developer account through a site like http://www.udid.in/.It's $5, and then you can try out the new OS before everyone else. That's how I got it on my 4S.

Yes, iPhone 4s, period are getting iOS 7. Doesn't matter the configuration.