Might sound like a dumb question, but it is very hard. Especially if you want to pay cash at a store.
During my last visit almost a year ago in Miami, no places had pre-paid SIM cards. ATT and Verizon at the mall I went wanted to sell me post-paid plans. They say they don't carry pre-paid anymore. Also went to target and CVS, same story.
I finally had to pass it because I did not want to pay 35 USD for one at the airport. I just want a US number, mine last one had been reclaimed by someone else.
I will be there again in a few weeks. Is it still possible to get one in USA these days?