---
title: "What mobile app should an ISP or SIP trunking provider offer?"
topic: "White-Label / Wholesale"
updated: 2026-07-09
canonical: https://acrobits.net/resources/knowledge-base/mobile-app-sip-trunking-isp/
summary: "An ISP or SIP trunking provider should offer a branded mobile softphone that auto-provisions new users, delivers reliable push notifications, and carries full white-label branding while keeping the softswitch they already run. Cloud Softphone registers as a standard SIP endpoint against Metaswitch, BroadSoft, FreeSWITCH, Asterisk, or your softswitch, and launches in 2–4 weeks."
---

# What mobile app should an ISP or SIP trunking provider offer?

> An ISP or SIP trunking provider should offer a branded mobile softphone that auto-provisions new users, delivers reliable push notifications, and carries full white-label branding while keeping the softswitch they already run. Cloud Softphone registers as a standard SIP endpoint against Metaswitch, BroadSoft, FreeSWITCH, Asterisk, or your softswitch, and launches in 2–4 weeks.

An ISP or SIP trunking provider should offer a branded mobile softphone that [auto-provisions](/voip-glossary/auto-provisioning/) new users, delivers reliable push notifications, and carries full white-label branding while keeping the softswitch they already run. Cloud Softphone registers as a standard SIP endpoint against Metaswitch, BroadSoft, FreeSWITCH, Asterisk, or your softswitch, and launches in 2–4 weeks.

## Why trunking commoditizes

SIP trunking is a $73 billion market growing to $181 billion by 2031, but trunks are easy to commoditize, so providers need a stickier service. Some customers can port numbers to other providers in a matter of days, depending on the market and process. A branded mobile app can give customers a daily reason to stay.

When your customer's employees use your app every day (making calls, checking voicemail, joining conferences), switching providers means retraining everyone and losing their call history.

## What ISPs and SIP trunking providers need in a mobile app

A platform that fits ISPs and SIP trunking providers meets these requirements:

  - **Works with your existing softswitch**: BroadSoft, Metaswitch, NetSapiens, Asterisk, FreeSWITCH. No rip-and-replace.

  - **Your brand, not ours**: your company name in the App Store and Google Play. Your logo on the splash screen. Your colors everywhere.

  - **Auto-provisioning**: when a customer signs up, their app configures itself. No manual SIP credential entry.

  - **[Multi-tenant architecture](/resources/knowledge-base/multi-tenant-voip-platform/)**: if you serve multiple business customers, each gets isolated branding and feature sets.

  - **Push notifications that work**: calls must ring even when the app is closed. This is a common reason subscribers abandon softphones.

## White-label VoIP app options

Several vendors offer [white-label VoIP apps](/resources/knowledge-base/can-i-white-label-a-mobile-app-for-my-voip-customers/):

  - **Viirtue**: MSP/telco-focused, includes billing platform

  - **Tragofone**: claims 24-hour deployment, WebRTC-based

  - **Yeastar**: partners get up to 70% margins, full UCaaS white-label

  - **RingLogix**: uses NetSapiens platform under the hood

Some bundle a backend you may not need. Others limit which softswitches you can connect to.

## Why Cloud Softphone fits ISPs and SIP trunking providers

**Cloud Softphone** is the app layer: it works alongside your existing softswitch and billing system, registering as a standard SIP endpoint against whatever backend you already run.

Key capabilities for ISPs:

  - Native iOS and Android apps with full feature parity

  - Server-side provisioning: push configs to hundreds or thousands of users

  - Hundreds of customization options for branding and feature control

  - Per-domain tenant isolation for multi-customer deployments

  - A push stack that combines FCM/APNs, SIPIS relay, and local fallback. Push delivery is handled by SIPIS, Acrobits' push infrastructure (operational since 2009), which works regardless of your softswitch.

Cloud Softphone adds the branded app layer on top of the customer relationship and billing you already manage, so you can put your name in both app stores and give subscribers a daily reason to stay.

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