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Start with the outcome: your users can talk, see, and message each other inside your app. Create a project, issue a short‑lived token per user, and install the Web, iOS, or Android SDK. Initialize the client, subscribe to connection and call events, and render a simple call UI with mute, hold, and end controls. For direct user‑to‑user calling, register each account with a unique identity, then dial by that ID. Add push notifications so incoming calls ring even when the app is backgrounded. Use built‑in network quality callbacks to adapt bitrate on poor connections and fail over gracefully.

Spin up live video in a few steps. Use the conferencing API to create a room, generate a role‑based join token (host, speaker, viewer), and drop a prebuilt component to show tiles, toggle camera/mic, and share screens. Enable cloud recording with one flag and fetch links after the session to embed clips in docs or slide decks. Configure a waiting room, lock the room, or remove attendees with moderation endpoints. Customize layouts, set bandwidth caps for mobile viewers, and publish captions or chat alongside the stream for engagement—all controlled by API or SDK options.

Bridge your app to phone numbers when you need reach beyond the app. Buy or port numbers, set outbound caller ID, and route inbound calls through an IVR, queue, or directly to an agent. Map business hours, holidays, and overflow rules. Use webhooks for call lifecycle events and store complete call detail records: who called, duration, disposition, notes, tags, and custom fields. Auto‑create tickets in your CRM, attach recordings, and export logs to your data warehouse on a schedule. Supervisors can monitor, whisper, or barge for coaching, while agents add wrap‑up codes that feed dashboards in real time.

Add messaging to round out the flow. Embed in‑app chat with threads, typing indicators, attachments, and read receipts; escalate any thread to voice or video with one tap. Send SMS for alerts, reminders, and one‑time passwords using templates and per‑country sender options. Track delivery and fall back from push to SMS if a device is offline. With the contact center APIs, wire up skills‑based routing, screen pops with customer context, and automated post‑call surveys. Design your event model with clear REST and webhook contracts so data moves cleanly to other systems, keeping conversations, metrics, and recordings in sync across your stack.