I know there were a few older threads about this but I need some advice so bare with me. I'm currently on an unlimited data plan with AT&T for my iPhone 4 but have never gone over 1.5 GB in a month. I bought an iPad 2 WiFi the other day and also own a Macbook Air. I would love to be able to tether both devices to my phone but am nervous to give up my unlimited plan "just in case." I should also mention that I use the devices mostly on WiFi at home and in my office but there are definitely times I will need use of 3G. If I don't switch to a tethering plan, I'll probably switch from the WiFi iPad to the AT&T 3G version. Did anyone else have the same thought process and what was your ultimate decision? Any other opinions/suggestions are welcome as well. Thanks.