you can’t get a sim card anonymously here, and i believe that’s the situation in other places.
It varies by country: https://en.wikipedia.org/wiki/Prepaid_mobile_phone#Privacy_rights
In the US you can still get a prepaid mobile without showing ID and pay with cash.
“Chunky” chicken soup in a can just costs a couple dollars, you could try heating that in a coffee pot. Add some fresh cherry tomatoes and canned fruit and you have a good meal.