Originally Posted by
nj1266 So you do not need a new data plan if you already have one for your iphone 4/4s? I have an unlimited Verizon data plan. Can I use the same plan for a new ipad?
You need separate data plan for each device - they are completely independent. You can have two different carriers, for example - at&t fpr iPhone and VZW for iPad - that is how separate they are. Other than a hotspot, there is no way to share one data plan between two or more devices.
Without putting words in anyone's mouth, the OP may have meant that iPhone already had enough data to meet [his/her] needs, so therefore did not need to have data plan on two devices when one already had enough.