If you don't know already, Walmart has free Sim card and free activation and already discounted my monthly plan by $2 as i am using a credit card. Phone went active in 30 minutes - awesome!
And to make sure everyone understands, this is a one time only - it is not monthly so once you use up the 5gb of data, you are back to your original data plan.
Of course they do not care - they do not and are not meant to do aftermarket customer service. That is why PM is so cheap - you have to go thru the PM website for service. Walmart only sells the card - nothing else.