I posted this in another thread earlier today, but it bears repeating again in this thread. These "plans" are a horrible option to choose from.
For me, I'm staying with my unlimited plan on iPhone, and will keep the separate $30 plan for my iPad. I can have (realistically) 6GB of data that way for $60 per month. If I choose the 1GB plan, I will have to pay $85 and get a lot less. Or go with the 4GB plan, still get less and pay $120. How does that add up?
From my other post earlier...
This whole US cellular market of data usage is a bunch of bunk. 1Gb, 3GB or unlimited, it's all irrelevant. The quantity of data a person uses has no affect on the network of AT&T, Verizon, et al. What matters and affects the network and it's users is the number of people on the network at a given time, in a given area and how many it can support. That's where the slow downs occur and congestion takes over. This is true whether a person uses 1MB or 10GB; it's all the same.
Imagine a highway with 2 lanes and 100 cars on it driving 55mph. Traffic should run fairly well. Now triple the amount of cars on the same road and traffic is going to get congested and the speed overall is going to drop significantly. If you widen the same road by 1 or 2 lanes, those 300 cars should be able to drive 55mph again and be fine. This is the same principle of the way the networks work.
The bottom line is the cellular companies are taking us for a ride and not a high speed one. They're cashing in on these "data plans" and restricting us the use of the road. We're only allowed to drive 3 miles on the unlimited length of the road each month. That is without regard to how many lanes are available and the amount of cars on the road. You could be the only car on a 3 lane road, but you're only allowed to drive 3 miles per month, or they're going to penalize you for driving further.
Then there is the text messages. Texting costs them next to nothing to accommodate as they insert that data in between regular telephone calls on the same network. Again, charging us all this money for these plans is uncalled for.
They are bringing in the cash hand over fist, yet their networks lag behind in capacity and speed. What are they doing with all this money? Perhaps they need to streamline their corporate & company structure and become more cost-effective.