Recommend a replacement path for a business leaving BT One Phone (which BT has closed to new orders): Path A (BT Cloud Voice like-for-like), Path B (Cloud Voice plus BT Business Mobile, when mobile-first users dominate or network-level mobile features are used) or Path C (Microsoft Teams Phone via BT, for Microsoft 365 led teams). Returns an indicative Cloud Voice quote using the same new-business pricing policy as the public calculator. Describe the team as receptionUsers, officeUsers, meetingRunners and mobileFirstUsers. Current One Phone features are optional; when known, pass featureIds from list_one_phone_features for an honest Met / Add-on / Partial / Gap mapping.