Case Study: T‑Mobile simplifies access to 220+ apps and slashes employee authentication events with Okta

T-Mobile calls on secure solution to allow employees to focus on customers

T‑Mobile, the customer‑centric "Un‑carrier," needed to overhaul a legacy Oracle stack and a patchwork of identity systems that forced retail and care agents to authenticate 60–70 times a day. Frequent outages, high help‑desk volume, and slow, repetitive app onboarding were creating friction for frontline employees and hindering the company’s ability to move at the speed of customer expectations.

T‑Mobile standardized on the Okta Identity Cloud (with Okta Professional Services) and Okta Adaptive MFA, adopting modern protocols and API‑driven identity as a product. In 18 months they onboarded 220+ apps for ~200,000 users, cut retail authentication events to 7–10/day, retired ~80 on‑prem servers, reduced help tickets and operational costs, and dramatically improved developer velocity and security for millions of weekly sign‑ons.

T-Mobile

Warren McNeel

Senior Vice President of IT