Hi there, Im new to the forum, so Hey! I'm Tom and joined because of this question that i have been pondering on. Here's the story; I have an 8gb iphone 3g that since the IOS4 update came out, it's useless. 14 seconds load time for settings etc. I've tried numerous aids such as turning spotlight off and all that stuff other people came out with on Gizmodo/Redmondpie. And frankly, none of its worked. So my question is, IF i pick up a rundown 3GS with a smashed up screen and looks battered for cheap. Could i replace my iphone 3g's logic board with a bigger, more speedy version of the 3gs? Thanks!