# SMS subscription

The Batch Android SDK allows you to:

* Add and remove phone number from a user profile. The profile will automatically be created if needed.
* Edit a profile's marketing subscription for the SMS channel.

{% hint style="info" %}
In order to set a phone number and subscription status on a profile, the [creation of a project](https://doc.batch.com/getting-started/other/overview-guides/98-send-emails-with-batch#create-a-project) is required. If no project is set up, any calls made for these actions will be ignored.
{% endhint %}

Here is how to set a phone number with a marketing subscription:

{% tabs %}
{% tab title="Kotlin" %}

```kotlin
// This requires to have a custom user ID registered 
// by calling the `identify` method beforehand.
Batch.Profile.editor().apply {
  setPhoneNumber("+33123456789") //  // Null to erase. A valid E.164 phone number.
  setSMSMarketingSubscription(BatchSMSSubscriptionState.SUBSCRIBED) // or BatchSMSSubscriptionState.UNSUBSCRIBED
  save()
}
```

{% endtab %}

{% tab title="Java" %}

```java
// This requires to have a custom user ID registered 
// by calling the `identify` method beforehand.
Batch.Profile.editor()
  .setPhoneNumber("+33123456789") // Null to erase. A valid E.164 phone number.
  .setSMSMarketingSubscription(BatchSMSSubscriptionState.SUBSCRIBED) // or BatchSMSSubscriptionState.UNSUBSCRIBED
  .save()

```

{% endtab %}
{% endtabs %}

> **Note**: the phone number must be an [E.164](https://en.wikipedia.org/wiki/E.164) formatted string starting with a `+` and not longer than 15 digits without any special characters. It should match the following regular expression : `^\+[0-9]{1,15}$`


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