Customers & Success Stories

50% of all Mobile Network Operators Worldwide use SIGOS Active Testing Solutions to ensure best mobile experience and service quality. Secure business success with accurate billing and fraud management. Drive future growth with best performing apps and innovations for happy subscribers and customers.

Read real-world success stories on
how SIGOS solutions can drive your business success.

Explore customer reviews from some of the
1,000 satisfied customers who are transforming their businesses with SIGOS solutions and services.

Ömer Altinok

Group Revenue Assurance Manager, Turkcell, Turkey
We are using all of SIGOS’ solutions: GlobalRoamer, SITE and Professional Services Telecommunications and have gained major achievements. For example, the SIM Box detection service has helped us to detect off-net SIM boxes which are used by most illegal carriers and cannot be detected by other fraud management systems. Now also our Turkcell subsidiaries want to use SIGOS SIM Box Detection services.

Takis Papadakis

Principal Quality Assurance Manager, Vodafone Roaming Services, Luxembourg
SITE has been an integral part for Roaming and GRQ Global Roaming and we rely on Keynote SIGOS as a trusted business partner to accomplish our strategies for Quality of Service.

Clara Casas Caballero

Network Quality Manager, Telefónica Spain
Only with GR we can test the throughout measurements that we couldn’t measure with any other system that we have. We are also very happy with the support and commercial team of Keynote SIGOS. It’s one of the best compared to other suppliers we have worked with.

Proudly serving over 470 network operators and 670 enterprise customers
in 157 countries worldwide to ensure best mobile experience and service quality.

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