Samuel updated the SMS-based two-factor authentication documentation in the github/docs repository, focusing on accurately reflecting country availability for this security feature. Using Markdown and strong documentation skills, Samuel revised the guidance to add Brazil and Uruguay while removing Bangladesh, Indonesia, Kazakhstan, and the Philippines, ensuring the docs matched current product capabilities. This targeted update aimed to reduce user confusion, especially for international users, and to lower support inquiries by aligning documentation with real-world feature availability. The work resulted in a release-ready, versioned documentation change, supporting smoother onboarding and clearer security guidance for users across different regions and product releases.