Upgrade ios system on iphone 3gs
I have an iPhone 3gs running on ios 4.1. I want to upgrade the ios so that I can start using some of the apps that are available.However I have been advised by an Orange support person (Orange is my carrier and I bought the phone from them some years ago) that the hardware of the 3gs is probably not advanced enough for the latest v6 of the ios. From looking through this forum it does appear thay many people have had problems with battery life, slow system, phone overheating, when they have upgraded their 3gs to v6. The suuport person said it might be possible to upgrade to 5 from the Apple site but I can't find anyway of doing this.
Can anyone help?
Thanks
Tony
iPhone 3GS, iOS 4.1