Speed up your iPhone 3G
If, like many, you’re finding your old iPhone 3G a bit sluggish, here’s a handy tip from @philipzaengle and @johnwilliams713... turn off Spotlight Search (providing you don’t use it, of course). Here’s how:
Settings » General » Spotlight Search » Turn off all items.
You should notice a sigificant increase in how responsive the phone is.