Thanks for the clarification. That is what I thought as well. I've heard of people being able to use Google Voice or other VoIP from 2FA even when it would normally be rejected by using a cellular number that they then port to Google Voice.

Based on what I've read, some video games are able to determine if you're using a prepaid plan or post paid. I suppose they might just look up the carrier to determine that since it doesn't seem like that level of granularity is available. And the port trick may work there as well.