I found someone asking how to register the way to register Apple ID for downloading free apps without using credit card, or purchasing iTunes gift card. Here's the way I found. Actually it's very easy. 1. Lunch iTunes on your computer and go to the Apps section or App Store section if you are using a lower version. 2. Click the “Get it” button on a free app. This is very important. And only in this way can you skip the step to use your credit card.