OpenAI requires a working phone number to sign up, and a credit card to use various features. So they just block the phone numbers (which has a country code),

OpenAI requires a working phone number to sign up, and a credit card to use various features. So they just block the phone numbers (which has a country code), and credit cards (which owner/issuer's country info is available). Not sure why this seems to be such a surprise to everyone here...