Hi @Rahul Patel
Thank you for posting your question on Microsoft Q&A.
Phone number acquisition is not supported on Microsoft Azure Sponsorship subscriptions, as these plans generally do not allow purchasing new phone numbers. Creating a Pay-As-You-Go subscription is often required when you need to obtain Azure Communication Services phone numbers.
It is also important to ensure that the billing country or region associated with your subscription supports phone number purchases. If the subscription is linked to a location where Azure Communication Services phone numbers are not available, the option may remain disabled. For detailed guidance on supported regions and subscription requirements,
please refer to the official Subscription Eligibility documentation: