> ## Documentation Index
> Fetch the complete documentation index at: https://help.messagesync.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Turn an Android phone into your own SMS gateway and text right inside CRM.

## SMS inside CRM

Turn your own **Android phone** into an SMS gateway and send or receive texts directly from
the CRM Conversations tab, with no per-message fees and no leaving your CRM.

Use your existing number, keep full control of your device, and automate follow-ups through
your existing CRM workflows.

<Info>
  New here? Start with the **7-day free trial**, then connect your device using the setup
  guide below.
</Info>

## Get started

<Card title="Android SMS Setup Guide" icon="message-sms" href="/sms/setup-sms" horizontal>
  Turn your Android phone into an SMS gateway. Covers the marketplace app, installing the
  SMS Sync app, and linking your device.
</Card>

## Before you connect

Make sure your device and SIM are ready to go.

<Columns cols={2}>
  <Card title="Are eSIMs Compatible?" icon="sim-card" href="/sms/esim-compatibility">
    Check whether your phone supports eSIMs and how to use an overseas eSIM to send and
    receive from a local number.
  </Card>

  <Card title="Troubleshooting" icon="wrench" href="/sms/troubleshooting">
    Messages not sending or receiving? Fixes covering installation, RCS, MMS, and SIMs
    previously used for iMessage.
  </Card>
</Columns>

## Go further

<Card title="Multiple Messaging Instances" icon="layer-group" href="/multiple-instances/overview" horizontal>
  Manage multiple numbers and learn how the system intelligently picks which number to use
  for each message.
</Card>