The challenge
Patient-helpline numbers cannot drop. The port windows offered by the losing carriers were narrow, and the LOA validation process at one of them had a known reputation for paperwork loops.
Our approach
Split the 8,400 numbers into two cutover waves. Pre-validated every LOA against the latest invoice from the losing carrier. Pre-configured routing on the receiving end so the cutover took seconds. Held a live war room during each window with both carriers and the customer's network team.
Outcomes
- All 8,400 numbers ported across two cutover windows.
- Zero customer-visible outage on any helpline.
- Three LOA loops avoided thanks to pre-validation against current invoices.
- Total project duration from kick-off to completion: six weeks.
"When the helpline does not ring on a Monday morning, our customer's customer notices. It rang every Monday throughout the migration."