A regular cell phone does not do enough, and has a small screen. An iPhone or smart phone is not easy to hold as one might hold a phone, but has all sorts of functionality and an OK screen. An iPad is kind of cool, but it does not have phone capacities. And, if it did, it would be hard to hold up to one's ear.
But, with a little tweaking ....
Ummm... I think a Blue Tooth solution is a bit more elegant.
err, maybe i should buy a normal phone and an ipad
You laugh now, but you've not seen the wonderful carrying case that is specially designed for this baby!