You do not need a credit card. You need to be able to pass a credit check or pay a security deposit to get a contract. Once you have an account, you can pay your bill by check.
I'm not interested in an 4g phone until there's a real live 4g network. AT&T barely has a functional nationwide 3g network. It's going to be years before they have a 4g network.
Minimum voice - $40/month. Minimum Data - $15/month. Minimum plan cost is $55/month plus taxes and fees. Higher plans are available and, of course, texting is optional and extra.
If you port your number before your Verizon contract is over, you will effectively end your Verizon service and Verizon will charge you the early termination fee. A Verizon phone cannot be used with Sprint. The only Verizon phones that can be used with AT&T are Verizon's global phones and the...
The bill comes in the mail. You either send a check or use online bill pay.
When you buy from Amazon, you get anything you would have gotten from the carrier. However, typically that simply includes a wall/usb charger. Other accessories are sold separately.
Oh and you will still have to pass...
You can use the iPhone solely on wifi. It works well where the signal is strong and much less well when the signal is moderate. I've found that it doesn't work at all when the signal is weak.