Am I still able to arrange a 3G plan for myself?

I have a iPhone 3GS without the data plan and it (AT&T) will soon put me onto one. I do want one, but I don't want the highest plan they're going to put me on. I'm on a family plan and my data charges would be added onto the family bill.
What are the options for data amounts and how do I go about seeing their charges and such?
Are they cheaper than 4G plans?

First off… 2G/3G/4G is the same data plan! I wish people would understand that. And when 5G comes out and 6G and 146754784361347G… It will still be the same data plan! So that answers your last question…

how do you find out such information? Well, go to ATT.com OR… Google Search…

http://www.att.com/...plans.html

your options?

DataConnect 250MB --- $14.99 /mo… Overages -- $14.99 per 250 MB

DataConnect 3GB --- $30.00/mo… Overages -- $10.00 per 1 GB

DataConnect 5GB --- $50.00/mo… Overages -- $10.00 per 1 GB

FYI -- Iphones eat data like a kid in a chocolate factory… Get 3GB as a bare minimum and use free Wi-Fi where ever possible… Or ignore me and get charge $10 for every gigabyte you go over 3GB