is it better to turn it off or to leave it in sleep mode, ive given up hope on redsn0w so i think the tethered version is the only way so u cant turn it off
Bro, you aren't making sense. Redsn0w is for ipt2g, and you definitely put it in sleep mode while not in use. If you have an iphone, why would you turn it off? I usually use my phone for answering calls... Strange thing, I know.
I'm not trying to be sarcastic here, but I have to agree with highonlife: it's a phone. It's meant to be left on.