VirtualSIM OTT platform
A carrier-grade OTT line — voice, video, and rich messaging — that rides on your IMS instead of a third-party walled garden. HD voice per GSMA IR.92, sub-second call setup, encrypted on every hop, and a smart-terminal app your subscribers actually open.
HD voice and video on the IMS spine
VoLTE per GSMA IR.92 with AMR-WB and EVS codecs; ViLTE for video; sub-second call setup. Dedicated QCI=1 bearers established via the Rx→Gx chain so every call gets guaranteed bitrate even on a loaded cell. P-CSCF, S-CSCF, TAS, MGCF, and IM-MGW are part of the same supported stack.
Smart-terminal app for rich messaging and self-care
Native iOS and Android (MVVM + Clean Architecture, Kotlin StateFlow / Combine Publishers). Photos, video, location, and group chat sit alongside balance check (TMF654), plan purchase (TMF620 + TMF622), and trouble tickets (TMF621). Push via APNs and FCM for low balance, 80%/100% data thresholds, and payment confirmations.
Encrypted by default
TLS 1.2/1.3 on every SIP leg, SRTP on every RTP leg, IPsec on the Gm interface between UE and P-CSCF per 3GPP TS 33.203. Tokens stored in iOS Keychain (kSecAttrAccessibleWhenUnlockedThisDeviceOnly) or Android EncryptedSharedPreferences backed by hardware Keystore. Certificate pinning on every API call.
