Which Azure support plans allow you to open a new support request?

All Azure support plans, including Basic, Developer, Standard, Professional Direct, and Premier, allow you to open a new support request. While the types of support requests and response times vary significantly between plans (e.g., Basic is for billing and subscription management only, Developer adds technical support during business hours, and Premier offers proactive support and a dedicated Technical Account Manager), the fundamental ability to initiate a support request is a feature across all tiers. Therefore, limiting the options to only higher-tier plans is incorrect as even the free Basic plan permits opening support requests for specific issues.