How to get iOS 7 on my iphone 4?

I have an unlocked iPhone 4 with T-Mobile and I would like the new update. However, everytime I check for an update, there's none. How do I get the new iOS 7?

I don't think you can get it until fall.atleast thats what the apple website says

Ios7

IOS 7 is in beta… Its only for developers and some funstions/apps do not work.hence, its for developers only

so… Become a developer and pay $99… If you are that desperate

or, if you don't care about your iphone, google the ios7 hack… There's a 60% change you'll brick your phone beyond repair… But heh, you'll be cool and have ios7

Ios 7 only works for certain phones and iPods.search ios 7 compatible devices and it should tell you if/how to get it.

It's only for developers right now. If you don't want to pay $99 for a developer account to try iOS 7 early, you can just register your device's UDID on http://www.instantudid.com/.It's $5 and they instantly register your UDID on one of their accounts. Then you can install iOS 7 before everyone else.