[UPDATE]
My Bad. I misunderstood the Mobile Share plan to include the first Smartphone in the Data plan. What a bad assumption that was. Instead of saving money, I will increase my current bill by $5 and get 1 GB more of data. Not the savings I was hollering about below in my original post.
The 3GB Mobile Share plan is $70, but in reality you have to have a Smartphone, so for me, with two Smartphones, the additional cost is $40 for the first phone and $40 for the second phone. I just assumed that because at least one smartphone was require for a Mobile Share plan, that the first phone was included in the the Data plan. (I said that didn’t I) The other advantage, if you could call it that, is that the extra $5 also buys me FaceTime over cellular (3G) and Tethering. Plus the Mobile Share plans allow me to tap into the AT&T wireless networks for free.
Damn, I was hoping for some savings.
Original Post (Please Disregard)
I cant’ wait for the AT&T Mobile Share Plans to arrive because it’s going to be a really good deal for me. I save money and get twice the data!
Here’s the situation. I have an iPhone. My wife has an iPhone. My mother-in-law has a regular phone. We have a Family Talk Plan with AT&T.
Simple enough, but usage patterns come into play. My mother-in-law talks on her phone abundantly. It’s her lifeline. So I have AT&T’s Family Talk 1400 Plan.
Then there is my wife and niece who are in cahoots with the scrapbooking thing. That burns up a lot of text messages. This requires the Family Messaging Unlimited feature.
My Data use requires the DataPro 3GB plan. My wife gets by with 200GB of Data.
Here’s what my current AT&T plan is costing me per month without any taxes.

When the new AT&T Mobile Share Plans arrive you buy Shared Data, and get unlimited texting and talk. Each phone is extra, but everyone shares the data and everyone gets unlimited texting and talk. (Did I mention that?)
Here’s what I’m looking forward to with the new Mobile Share Plans.

I can save $35 per month and still get 1GB more Data with the 4GB plan. However, I’ll probably get the 6GB Plan, which will double my Data and save me $20 per month.
FaceTime is likely to burn more data with the new availability over cellular with this Mobile Share plan, so the extra data will give me room to expand my usage without worry for the foreseeable future.
There’s been a big uproar in the Tech Press recently since AT&T has announced that FaceTime will expand to cellular (3G) only with the Mobile Share plans. Everyone is complaining they’re getting hosed by having to switch plans to get FaceTime over 3G. No one has considered if the Mobile Share plans are really an advantage over the older plans. Plans that will eventually be the minority, in my opinion.