Iphone 3g lagging

Hello Everyone,

I'm wondering why is apple not doing anything about the lagging of our Iphone 3G? It's very irritating when you are typing something and the letters will appear after 5secs. whenever you browse through your apps it doesn't respond right away. are they not fixing it so that we will buy their new product?It's a waste of money, my Iphone is working perfrctly fine until the OS was upgraded to 4.0, 4.1, 4.2.1. C'mon apple people, you gotta do something to fix this issue. Plus, you are leaving 3g phones behind these updates you have with 3gs-4s that's unfair. I'm not asking for anything else, just fix the lagging of my 3g and i will be good.