What are the opening hours?

Monday 08:45 - 18:00 Tuesday 08:45 - 17:00 Wednesday 08:45 - 18:00 Thursday 08:45 - 17:00 Friday 08:45 - 18:00

Sigma Telecom

Name: Sigma Telecom
Address: Avrupa Office, Atatürk Dist, Muhtar Hasan Street No: 1 Floor: 20, No: 74, 75, 76, 77, 34757 Ataşehir, Istanbul, 34755, TR
Telephone: +90 216 999 358

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Sigma Telecom

Sigma Telecom was founded in 2003 to provide high quality telecommunication infrastructure services.

Today Sigma provides high quality VOIP and software services to telecommunication operators, suppliers and vendors worldwide. Sigma Telecom was founded in 2003 to provide high quality telecommunication infrastructure services including; optimisation, planning and drive testing. In 2012 Sigma made the move to begin providing high quality VOIP services to telecommunication operators, suppliers and v

endors worldwide. Sigma Telecom’s aim is to deliver communication products that convert communication networks via progressions in capacity. Whether the subject is improving network quality and reach, Sigma Telecom grows with a commitment toward innovation to provide its customers the benefits of best quality phone calls, lowest costs and flexible services. Sigma Telecom has developed an impeccable reputation in 13 years with its global clients. Working with leading Tier 1, equipment providers, governmental agencies and industry associations worldwide, has been a source of pride for Sigma Telecom. Find out more and keep up to date with Sigma Telecom by following us on LinkedIN, Instagram and Twitter:

https://www.linkedin.com/company/sigma-group-telecom
https://twitter.com/sigma_telecom
https://www.instagram.com/sigmatelecom/

20/08/2026

A milestone now making headlines across Türkiye.

Sigma Telecom’s #2 ranking in the Service Exports category in Türkiye has been featured by leading national media outlets.

A shared achievement, built

Discover the milestone link in bio.

19/08/2026

Nairobi, here we come.
Sigma Telecom will be attending ITW Africa 2026, taking place from 7–10 September at the Radisson Blu, Upper Hill, Nairobi.
Our team is looking forward to building new connections, strengthening partnerships and exploring opportunities across voice, SMS and global connectivity.
Meet our delegates:
Onur Kemal Koç
Sales and Technical Director
Niloofar Dadashi Mehr
Voice Team Leader
Busra
Senior SMS Account Manager
Let’s connect in Nairobi.

17/08/2026

Belgrade is next. 🇷🇸
The Sigma Telecom team is heading to CEE CEE Summer 2026, taking place from 2–4 September at Crowne Plaza Belgrade.
Three days to connect with the wholesale telecom community, exchange perspectives and strengthen the partnerships that keep the world connected.
Let’s connect in Belgrade. 🤝
Ceyhun Batırlıer
Afşin Demiröz
Tamer Icoglu
Belgrade

10/08/2026

Proud to Be Ranked #2 in Service Exports
We are proud to announce that Sigma Telecom has ranked #2 in the Service Exports category of the Bilişim 500 – Turkey’s Top 500 IT Companies 2025 Research.
This achievement represents more than a ranking. It reflects the strength of our international operations, the trust of our global partners, and our team’s commitment to delivering reliable telecommunications services across borders.
With more than two decades of industry experience and a continuously expanding global network, we remain committed to strengthening Türkiye’s position within the international telecommunications ecosystem.
We sincerely thank our team, customers, and business partners whose contributions made this milestone possible.
From Türkiye to the world, we keep connecting, growing, and moving forward.
Telecommunications Telecom Türkiye GlobalConnectivity GlobalBusiness TechnologyExports BusinessGrowth

23/07/2026

See you in Bali.
Our Head of Sales, Oğuzhan Karakaş, will be attending BATIC 2026 in Bali, Indonesia.
BATIC brings together telecom operators, carriers, technology providers, and digital ecosystem leaders from across the globe. We’re looking forward to exchanging ideas, strengthening partnerships, and exploring new business opportunities.
If you’ll be attending, let’s connect.
📍 Bali, Indonesia
📅 24–28 August 2026
Oguzhan

26/06/2026

A journey to remember at MWC Shanghai 2026.

Sigma Telecom, represented by Oğuzhan Karakaş, Head of the Sales Team, joined MWC Shanghai for days of meaningful conversations, new perspectives, and global telecom connections.

Every meeting opened a new opportunity.
Every connection shaped the way forward.

Thank you, Shanghai. The journey continues.ofc

24/06/2026

Sigma Telecom is in Shanghai with Oğuzhan Karakaş, Head of Sigma Telecom’s Sales Team, connecting with global telecom partners, exploring new opportunities, and joining future-focused conversations across the telecom industry.

At MWC Shanghai, we are proud to represent our vision for smarter, stronger, and more reliable global connectivity.

Sigma Telecom — connecting businesses worldwide.
ofc
GlobalTelecom A2P SMS Voice BusinessDevelopment

22/06/2026

Sigma Telecom at MWC Shanghai 2026🇨🇳

Our Sales Team member Oğuzhan Karakaş represented Sigma Telecom in Shanghai, connecting with global telecom partners and exploring new opportunities for future connectivity.ofc

Address

Avrupa Office, Atatürk Dist, Muhtar Hasan Street No: 1 Floor: 20, No: 74, 75, 76, 77, 34757 Ataşehir
Istanbul
34755

Opening Hours

Monday	08:45 - 18:00
Tuesday	08:45 - 17:00
Wednesday	08:45 - 18:00
Thursday	08:45 - 17:00
Friday	08:45 - 18:00

Telephone

+90 216 999 358

Website

http://www.sigmatelecom.com/

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