yes
I do believe it is since the unlimited data is the connectivity to the internet. Without data you have no internet. Hope that helps.
yes there is unlimited texting on the iPhone 3gs and the iPhone 4.There is unlimited texting on all iPhones.
If you have unlimited texting in your plan than you should be able to text all you want without any extra texting charges unless you are texting someone that doesnt have the same carrier as you. If...