I keep my iPhone 3G as up-to-date as iTunes will allow by default. I am having some trouble though because even though we were told when we purchased the phone that it would not expire and we would be able to use it, that does not appear to be the case.
Some iPhone apps won't install on older iPhones. This seems a little tricky to me because if the App is already on my phone, it will continue to update, but won't even install on my wife's phone. We have separate accounts and like it that way and e use an app called "bump" to bump apps that we want if that is a problem. However, sometimes there are new apps that we want to try and can't because our phones are older models. They still work great for us though.
Is there any way force our phones to take the new OS or employ some other method that will allow us to buy apps that are designed for newer models?