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Its not difficult to pay with cash and to not enter your phone-number at the register. Paying with cash is a helpful way to budget.

Until they go cashless :(

It's also exasperating to those who think that unless you pay cash you're not being fingerprinted regardless of any choice you did/not make. And with RFIDs picked up in your basket, cash likely not going to help either. What does it take, a combination of 5-6 purchases in one area, perhaps repeated in part a handful of times to make a profile that almost certainly you? It's the buisiness of groceries to fingerprint you, even before anything digital came along, how else do they optimize what they sell?

Mobile phones an essential service?