How to install ios 7 on iphone 3gs?

How to install ios 7 on iphone 3gs?

Ios7 isn't supported on 3GS. It goes iPhone 4+! Sorry:(

IOS 7 is not likely supported on the 3GS, atleast not without a jailbreak. I would say stick to your old operating system or get a newer iPhone. Even iOS 5 is taxing on a 3GS. Having owned one myself, I would not put anything newer than iOS 4 or 5 on there.iOS 6 is even iffy.

Iphone 3gs is not support ios 7, so you can't install ios 7. But some times modded whitedoor 7will be released for for iPhone 3gs

You can't install ios 7 on iphone 3gs because it's not meet the minimum requirements for the ios 7 some times you can install whitedoor for 3gs it will be released soon
Read more here http://www.mobilepctimes.com/2013/06/ios-7-direct-download-mirror-links.html

No, iphone 3gs is not support ios 7, so you can't install ios 7.

The 3GS doesn't support the iOS requirements to run iOS 7 it will be released to the iPhone 4 and above. They stopped supporting updates to the system software after iOS 6.1.3