How We Rebuilt Calmex VoIP Calling App, Softswitch and Web Portal in Six Months

Calmex, an MVNO with a calling app

Calmex Telecommunications is a Mobile Virtual Network Operator (MVNO), which offers a free-to-download mobile application. The app uses a data stream for GSM calls to provide cost-effective calling for its users.

Problems with the earlier Calmex mobile app

The mobile application developed by another IT vendor for Calmex Telecommunications posed serious challenges for the company.

Call drop and poor quality on the old app

Users frequently complained of poor call quality and call drop.

Why the basic Calmex app held the MVNO back

Subpar performance of the mobile application with very basic features hindered the MVNOs ambitions.

The third-party billing Calmex could not change

Calmex was completely dependent on a third party billing solution, which was not customizable.

No failover or room to grow call volume

The framework of the server did not support failover functionality and scalability to keep up with the growing volume of calls.

Low adoption and retention of the old Calmex app

Plagued by performance issues, the mobile application did not find many takers and customer retention also became a challenge.

The Class 5 softswitch, portal and new Calmex app

Architecture of the Calmex solution: a Class 5 softswitch, a multi-tenant web portal and a mobile app with a softphone dialer for app-to-app and app-to-PSTN calls, plus group calling, encrypted messaging, contact sync, POS recharges and in-app plan purchase.

Calmex Telecommunications reached out to Ecosmob Technologies’ Native App Development team to build a custom mobile application. Upon in-depth assessment, Ecosmob Technologies developed the comprehensive VoIP solution comprising– VoIP Softswitch, multi-tenant web portal, and mobile application to help Calmex meet its goals.

App-to-app and app-to-PSTN on the new dialer

With an innovative mobile application, packed with utility tools and features the company now offers high-quality calling through a softphone dialer for app-to-app and app-to-PSTN (Public Switched Telephony Network) calls.

Group audio and video on the Class 5 softswitch

The mobile application utilizing class5 Softswitch technology imparts high-quality one-to-one and group audio and video calling.

Opening the Calmex app from a SIM or the store

Users can access the Calmex app effortlessly, either through a SIM card or direct mobile application download.

Encrypted chat and contact sync in the Calmex app

End-to-end encrypted messaging and seamless contact sync offers world-class security and experience for group and individual chats.

Store POS recharges inside the Calmex app

Tightly integrated third-party POS with Calmex app enables quick data and voice package recharge from any nearby store.

Buying a plan from the app with no balance

From the mobile application, customers can directly purchase data bundles or a new plan even if their balance is exhausted.

What Calmex’s managing director said

“The Ecosmob Technologies team accepted the challenging assignment to pack both VoIP calling and advanced messaging in a tightly knit mobile application, which could be accessed both through a SIM card and App Store. What stood out for us was transparent communication, technology proficiency and the team’s professionalism in delivering the application within six months,”

Mr. Velaphi Mathebula, Managing Director