It has always struck me as odd that the cellular iPad does not have a phone app so that it can be used to make calls and send/receive SMS with its own number. Granted that many people wouldn't want to use it this way. The question is not whether it should have it, but why it doesn't have it, since it doesn't look like something overly complicated to implement.
Carriers could simply offer the option of data-only or data+phone plans.
Carriers could simply offer the option of data-only or data+phone plans.