Do you sell prepaid SIM cards that can be used on smartphones for visiting foreign travelers?

I do not know if I can buy a prepaid SIM card at the airport, but I can get it at many stores. I know that Best Buy sells prepaid SIM cards on behalf of multiple cell phone companies. Q: Do you sell prepaid SIM cards that can be used on smartphones for visiting foreign travelers? A: I 'm not sure you can purchase a Prepaid SIM card at the airport, but they are available at many stores. I know Best Buy sells Prepaid SIM Cards in behalf of multiple cell phone carriers. ------ You are welcome. You honor us at your visit, and I hope you enjoy California. You are very welcome. You honor us with your visit and I hope you enjoy California.

Mark O'Deady, Thank you very much for your kind answer. Also, thank you.

In the airport, there is a little kiosk once you exit the secure area that sells sim cards. I'm not sure which for which cell companies they have sim cards