Indonesia’s largest telecom operator

Migrating 20M+ live subscribers with zero downtime

A national digital brand embedded in legacy OSS/BSS, moving to a cloud-native SaaS platform while new customers kept onboarding throughout. Ten months to replace the platform underneath a business that never stopped growing.

Data Transformation

OUTCOME

20M+

Subscribers migrated with no customer-visible downtime

150 min

Full migration completed at go-live

100+

Full-cycle dry runs before touching a live customer

CONTEXT

The operator's digital brand ran at national scale, deeply embedded in legacy OSS/BSS systems and customer journeys, and all of it had to move without the business ever feeling it. More than 20 million active subscribers, plus their products and transactions, needed to migrate without interrupting service. Zero data loss and zero revenue loss were non-negotiable from day one. The window was ten months, and new customers kept onboarding the entire time.

SOLUTION

Synapt Data Transformation, deployed as a purpose-built migration framework for a live, growing production system.

  • Modular and reversible by design, so every stage could be monitored, paused, corrected, or rolled back without touching live services

  • Automated reconciliation and exception handling to guarantee data consistency at scale

  • Over 100 full-cycle dry runs to prove the framework before it reached a single live customer

  • A reusable blueprint, repeatable across future large-scale operator migrations

SPOTLIGHT

  1. 01

    Reversible migration stages

    Every stage monitored, paused, corrected, or rolled back without service impact

  2. 02

    Automated reconciliation

    Exception handling and validation guaranteeing data consistency at scale

  3. 03

    Rehearsed cutover

    100+ full-cycle dry runs proving the framework ahead of go-live

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