Walmart is the store for illegal aliens. Cash will do...
Considering a lot of their staff is on food stamps, and can barely afford to shop at Walmart, maybe that's were the cash/food stamps comes from... Yes, they are THAT cynical. I'm surprise they're not giving pay loans right at the counter....
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It's not too hard to get a cheap smartphone, and to pay for it and the data plan with cash (via pre-paid). You don't need good credit or an income over a certain amount to do it.
While that's true, those people don't even buy apps, downloads apps and browse the net on their slow bricks. Think they're the first to use a phone to pay?