Why when I try to download a free app on my iPad it says Tap Continue and Sign In To View Billing Info?
Usually, when that happens I open iTunes on my desktop to choose "None" as my payment type. Then when I re-visit my billing info on my device the "None" option is selected and I leave it as that. However, some applications or trials for in-app purchases will require you to enter a credit card to use that service, so that's another issue you may run into if you continue to keep the option "None" in your billing info.