Currently, I am using an unlocked iPhone 3GS on T-Mobile with only 1000 mins on my contract. No data plan whatsoever. I have to use Wi-Fi all the time. It is running iOS 4.0.1 right now. I was wondering whether or not I should sell my 3GS and buy an iPod Touch 4th Gen. Oh and BTW, I can use a simple flip or slider phone if I buy an iPod Touch. Please reply ASAP. Thank you!