Adding on to this one since it was the only link to the map data. There's some other supplemental data available. The supplemental PDF [1] has a bunch of the vendor names and there's a Google Docs sheet that has the list of vendors and availability per area. [2]

[1] https://www.science.org/doi/suppl/10.1126/science.adw8154/su...

[2] https://docs.google.com/spreadsheets/d/1Aialrzkl4kjk2WgQac5f...

The Vendors that actually got included in COTSI are these:

Vendor1 https://sms-activate.org/price 16,310,000 China Vendor3 https://5sim.net/ Vendor 5,137,000 China Vendor5 https://smshub.org/en/main 1,871,000 Indonesia Vendor7 https://smspva.com/ 1,212,000 Nigeria

Others got Reserved (and I guess maybe they'll be included eventually?)

Vendor4 https://sms-man.com/ 2,751,000 USA Vendor6 https://sms-activation-service.com/en/ 1,778,000 Russia Vendor9 https://2ndline.io/ 320,487 Vietnam