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Build Your Telecom Operator in the Cloud.

Launch a carrier-grade IMS and VoWiFi platform without the capital burden of traditional mobile infrastructure. VoiceBuy empowers MVNOs and cloud startups to deliver native WiFi Calling, seamlessly integrated with any SIP-based softswitch or our end-to-end native ecosystem.

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Legacy Infrastructure is Halting Innovation.

Building a mobile operator has historically required massive capital expenditure, rigid hardware dependencies, and complex SIP application workarounds. For modern MVNOs, VoIP providers, and cloud telecom startups, speed to market and frictionless user experiences are the ultimate competitive advantages.

Supported by WESY S.A.S France, VoiceBuy eliminates the hardware bottleneck. We provide a completely cloud-based IMS architecture that enables true Native WiFi Calling directly from the smartphone dialer. You maintain total control over your business logic and subscriber identity; we handle the carrier-grade network.

Architected for Scale and Convergence.

01 // Native VoWiFi & Identity

  • Native WiFi Calling: Enable subscribers to make and receive calls directly from their smartphone’s native dialer over WiFi—zero clunky SIP apps required.
  • eSIM, USIM & ISIM Ready: Architected for modern subscriber identity environments, supporting seamless provisioning and secure, SIM-based IMS authentication.
  • Future-Proof Network: Deploy a mobile-first telecom experience built specifically to support advanced cloud architectures and next-generation protocols.

02 // Open Softswitch Compatibility

  • Agnostic Integration: Connect your IMS Cloud seamlessly with your existing Class 4 or Class 5 SIP-based softswitch using standard SIP trunking.
  • Intelligent Routing: Leverage IP-based authentication, CLI-based subscriber identification, and custom routing logic entirely within your current environment.
  • Zero Vendor Lock-In: Upgrade your mobile capabilities instantly without ripping out your established billing or routing infrastructure.

03 // Native VoiceBuy Synergy

  • End-to-End Ecosystem: Pair the IMS Cloud with the VoiceBuy Softswitch to create a fully integrated, turnkey telecom operator platform.
  • Real-Time Charging: Execute sub-second subscriber balance checks and CLI-based charging logic precisely before call routing occurs.
  • Automated DID Management: Instantly assign numbers, manage complex routing paths, and connect subscribers to active telecom services dynamically.

04 // API-Driven Multi-Tenancy

  • Wholesale & White-Label: Host multiple distinct telecom brands, MVNOs, or enterprise clients on a single, securely partitioned IMS cloud instance.
  • Total Automation: Automate subscriber activation, SIM provisioning, and account control entirely through robust, developer-friendly APIs.
  • Frictionless Scalability: Expand your multi-tenant capacity instantly without deploying new physical nodes or disrupting active services.

Engineered for Scale. Built for Control.

Manage complex subscriber identities, multi-tenant operators, and deep network integrations from an intuitive, centralized command environment.

portal.voicebuy.com/ims-dashboard

Global MVNO Dashboard

System Health: Optimal (99.99%)

Last 24 Hours
Active Subscribers
12,450
Concurrent VoWiFi
842
SIP Trunk CPS
45.2
P-CSCF Status
Online
Live VoWiFi Traffic Volume

Global Command Center: Monitor active subscribers, VoWiFi traffic, and multi-tenant performance across your entire IMS network at a glance.

portal.voicebuy.com/subscribers

Subscriber Directory

IMSI / MSISDN
Status
SIM Type
20815...992
+1 415 555 0192
Active (VoWiFi)
eSIM Profile
20815...334
+44 20 7946 0958
Offline
Physical USIM
20815...118
Unassigned
Provisioning
eSIM Profile

Subscriber Profile

IMSI: 208150000000992

eSIM Ready

Identity Provisioning: Seamlessly manage eSIM/USIM profiles, allocate Global DIDs, and activate user services via visual interface or API.

portal.voicebuy.com/integrations

SIP Trunk & Routing Bindings

Outbound Softswitch (Primary) Connected
Host: sip.core-route1.voicebuy.com:5060
TCP TLS 1.3
Billing Webhook API Standby
Endpoint: https://api.billing.internal/v1/auth
Real-Time Webhook Example
POST /v1/billing/pre-auth HTTP/1.1
Content-Type: application/json
Authorization: Bearer vbt_...

{
  "event": "call.initiated",
  "subscriber": {
    "imsi": "208150000000992",
    "msisdn": "+14155550192"
  },
  "session": {
    "destination": "+442079460958",
    "network": "VoWiFi",
    "sip_call_id": "a84b4c76e...98f"
  }
}

Softswitch Synergy: Configure secure SIP trunking, map real-time billing integrations, and define custom routing rules effortlessly.

Ready to Launch Your Cloud Telecom Operator?

VoiceBuy IMS Cloud provides the agile infrastructure required to build, manage, and scale a modern WiFi Calling network.

Deploy Your IMS Cloud Today