OK, here's the deal...
The sticking point is the CDMA radio they used in the iphone isn't capable of it. The radio in the Thunderbolt is.
But if you don't want data, then get an ipod touch, and a flip/texting phone.
It makes perfect sense for Apple to release another 3G iPhone to both Verizon AND AT&T because they know that they'll still sell 60 million units without batting an eye. Sold units is money in the bank for Apple, or in other words, "perfect sense."
I have a Verizon phone that does simultaneous voice and Internet data and I never use it. Maybe if I lived in a world where I could be on a phone call and the person I'm talking to decided to email me something instead of just telling me what the email says, I'd need the feature. IF you need it, all power to you, but by the sound of it,...
200 MB for $15
2 GB for $25
4 GB with tethering/mobile hotspot for $45
2 GB for $30
5 GB for $50
10 GB for $80
Can add mobile hotspot to any of those for $20 extra, which also gives 2 GB data
Now, while Verizon may have higher plans, they're a helluva lot more expensive, and most people won't need more than the 2 GB plan on either carrier. If you don't need data that much and just want the smartphone, you can pay for the AT&T's smallest plan (200 MB for $15), but with Verizon the least you could pay is $30 for 2 GB.
Me personally, I have the 200 MB plan with AT&T and just use Wi-Fi when I need to. Wi-Fi is everywhe...
Verizon has a 300MB for $20 bucks in select markets. I'm in one of those markets, thats why i asked the question.