To increase your chances of getting instant approval of A Walmart Credit Card you should make sure your credit score is at least 640 or above.
Make sure you have a valid mailing address and then you'll need your SSN number and be at least 18 years old or older and you'll increase your chances of getting approved for the Walmart Credit Card.
You can apply for the Walmart Credit Card either in the store or online and if you apply online you'll get an instant decision of the Walmart Credit Card in most cases.