Walmart shoppers can get a FREE Pantene Expert Collection Sample at a participating store with a Freeosk location. Limit one offer per person. Text FREEME to 313131 OR scan your Freeosk mobile app to get your sample, while supplies last. Here’s how to use the Freeosk app at Walmart: Download the Freeosk Android app or iPhone app then scan the app at the Freeosk to grab your sample. Enjoy a new free sample every week! Click here to see if your Walmart store is participating.