As of Admin API 2026-01, the phone field is now publicly available in the orderUpdate mutation's OrderInput. This field allows developers to update the customer phone number for an order, overwriting the existing phone number.
This change brings parity with the REST API, which already supports updating the phone field through the Order resource. The phone field is particularly useful for maintaining accurate customer contact information, especially for SMS notifications and order-related communications.
For implementation details, refer to the orderUpdate mutation documentation.