How to get IOS 7 on iphone 4 legally?

How do you get IOS 7 on iphone 4 legally?

Yea people at the apple store have a beta version. You can watch the keynote too.

You can create a developer account (not free) at Apple. Then you get access to the Beta version of iOS 7.

The final iOS 7 doesn't exist yet - only the Beta version.

You could possibly count this as legal because apple hasn't patched this eay yet. The free way to do this is to download the ios 7 ipsw for your iphone from a website ( there are many out there, make sure you download the right one for the iphone 4) and basically connect your iphone to itunes and press shift + update on pc ( option + update) on mac. Then select your ios 7 ipsw for the iphone 4 and then just wait till it finishes. Just make sure that your phone is acticated on ios 6 before you update or it will ask you for a registered UDID. And just letting you know, ios 7 on iphone 4 is not very good. It is slow and crashes alot. But you can try it and it and if you don't like just restore to ios 6.