# SMS Devices (Physical Phone Relay)

## SMS Devices Introduction

SMS Devices extend telephony by connecting real mobile phones to the platform. Use them when software-defined numbers are not enough for your workflow.

Talk to your administrator to procure and configure physical phones.

{% hint style="info" %}
SMS Devices are an optional feature subscription and require advanced configuration.
{% endhint %}

## SMS Device / Telephony Management

SMS Devices use a physical phone together with Replica telephony features. The phone runs a Replica Android app and uses a software-defined relay number from providers such as Twilio or Bandwidth.

This setup can help when websites reject software-defined numbers, especially during account creation or two-factor authentication flows.

### Configuration

{% stepper %}
{% step %}

### Open SMS Devices

Open `Telephony` from the `Administration` menu, then select the `SMS Devices` tab.

This page shows the configured SMS devices.
{% endstep %}

{% step %}

### Create SMS Device

Click `Create SMS Device`.
{% endstep %}

{% step %}

### Provide Device Details

Enter the physical phone's `Device Number`, a `Name`, and an optional `Description`. Then select a `Relay Number`.

Use a relay number that is not already assigned for normal software-defined messaging. One relay number can serve multiple SMS devices.
{% endstep %}
{% endstepper %}

## Android App

The Android app is available in the Google Play Store and runs on supported Android devices.

After you create the SMS device in Replica, install the app on the target phone and configure it with the selected `Relay Number`.

The app does not support RCS. Disable RCS on the phone to force SMS delivery.


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