

Ensure your mobile services work seamlessly worldwide.
Run real in-country call & SMS, roaming, hosting, URL and IVR tests to reduce revenue leakage and keep customers happy worldwide.
Over 800 In-Country
Testers in 200+ Countries
Serving the Telecom
Industry for 20+Years
Discover how we’ve helped global enterprises solve their toughest telecom challenges.
Telecom Equipment Hosting
savings on hosting fees by using GTT’s local staff and on-site equipment instead of data centers.
eSIM with Global Useage
savings on eSIM costs, activation, and subscriptions compared to other vendors.
Regular Phone Number Testingg
of outstanding issues resolved within just 1–2 months through weekly and monthly number testing.
Annual Inventory Testing
of phone numbers in company inventories are non-operational on average.
Founded in 2007, Global Telecom Testing was built on the principle that the most reliable testing is done on the ground, in-country. Our mission is to provide global enterprises with accurate, real-world data and expertise to ensure flawless telecom connectivity.

Stephen Levenson

Director of Operations






Global Telecom Testing or GTT, leads the way in telecom testing services. We focus on testing phone numbers, IVR platforms, and global roaming. With a team of over 800 testers in 200 countries, GTT creates real-life in-country user experiences. This helps businesses spot and fix issues before they reach customers.
Testing in the country is imperative. It shows how your customers experience things firsthand. Automated testing can overlook issues like wrong dialing codes or lousy call quality. Using local testers helps catch these problems early for smooth telecom operations worldwide.
We have different services to test phone and internet connections, like:
Each service helps you have a robust and dependable phone system.
We test phone numbers by making live calls from local networks in over 200 countries. This way, we check if the numbers work, assess call quality, and confirm IVR systems operate smoothly. You get detailed call records for each test. This helps with performance proofing and troubleshooting any potential problems.
Launching mobile services in new countries can be tricky. Many face global roaming issues that make things complicated. Testers use local SIM cards to check network access and call quality. This step helps avoid problems like activation failures.
Absolutely, we understand your needs. Live testing gives the most accurate results, but we know that can take time. Our automated testing works around the clock for those looking for quicker solutions. It lets you test several scenarios at once without hassle.
Starting can feel overwhelming. You want the right solutions for your business. Just reach out to us. We will discuss your needs and help you find the best testing options that fit your situation.
We are the only company that offers testing in 200 countries. Many businesses appreciate our mix of live and automated options. They like the flexibility of our services without the need for long-term contracts. You can choose what works best for you.
If you did not find the answer you were looking for in these Global Telecom FAQs, do not worry. We are here to help. Contact us today to learn more about how we can support your telecom testing needs.