Alright so here's the situation. My brother recently got an iPhone 4 and he gave me his old 3g one. I already have a phone and can't support paying for a data plan but I want to use it as an iPod touch basically. Right now it runs pretty slow on Ios 4. whatever its on now. 1 I think. I'm capable of jailbreaking it I was just wondering what steps I should take. Should I downgrade to a 3.x os to make it faster? then jailbreak it? And will this effect getting new apps from the iTunes store? Basically right now I turned off the 3g, the phone access, and I leave it in Airplane mode. Is there a more simple way to effectively disable the phone part of it after jailbreaking it?