Yes, making a phone call and say, for instance, doing the dishes at the same time is absolutely heaven for the multi-tasker.
I think that we all know that 1 minute of talking is more expensive than 1 minute of texting (4 times more in my case, with my specific phone company). So there's a lot to be saved here.
It's just always been convenience (or rather, inconvenience) that has nudged me in one particular direction.
So this is what I've been doing all day today.
And I'll tell you something that I've learnt... what I've noticed is that there's a real bonus in this tip, for all of us who dislike texting. I've realized that I'm using my phone less because I really do dislike text messaging and I'm beginning to think long and hard before I start a text-conversation with anyone whether the conversation is really important or just a way to pass the time.
So let's take a look at this for a second. You're saving money per minute and using your phone less. It's a win-win situation.