I currently have an iPhone 4S with AT&T service. I have the $15/month 200MB data package. I usually only use about 60-80MB/month so that is fine. I would like to get an iPad (or iPad Mini possibly). 95% of the time that I use it I will be in a WiFi. The other 5% of the time I might be on the road or in a customer's house and need to send/receive an e-mail, check a webpage, or something else small like that. Since I already have the wireless capability on my phone, and I always have my phone on me, I would like to save the $129 initial cost plus data plan cost for the iPad. AT&T's website says that I can upgrade my current iPhone plan to a tether plan for not too much more money. But someone here said that tethering is using a cable, I would rather it be wireless. On the other hand, I've read people saying that you can now connect without upgrading your plan. So I am very confused and would like some clarification from people who know about this. Thank you, I appreciate it.