diff --git a/app/main/forms.py b/app/main/forms.py
index f6c27ec75..e79c4d538 100644
--- a/app/main/forms.py
+++ b/app/main/forms.py
@@ -696,10 +696,18 @@ class ServiceLetterContactBlockForm(StripWhitespaceForm):
             )
 
 
-class ServiceSwitchLettersForm(StripWhitespaceForm):
+class ServiceSwitchChannelForm(StripWhitespaceForm):
+
+    def __init__(self, channel, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.enabled.label.text = 'Send {}'.format({
+            'email': 'emails',
+            'sms': 'text messages',
+            'letter': 'letters',
+        }.get(channel))
 
     enabled = RadioField(
-        'Send letters',
+        'Choices',
         choices=[
             ('on', 'On'),
             ('off', 'Off'),
diff --git a/app/main/views/service_settings.py b/app/main/views/service_settings.py
index fcef0ae12..3cd9f5585 100644
--- a/app/main/views/service_settings.py
+++ b/app/main/views/service_settings.py
@@ -48,7 +48,7 @@ from app.main.forms import (
     ServiceReplyToEmailForm,
     ServiceSetBranding,
     ServiceSmsSenderForm,
-    ServiceSwitchLettersForm,
+    ServiceSwitchChannelForm,
     SMSPrefixForm,
     branding_options_dict,
 )
@@ -368,15 +368,6 @@ def service_set_contact_link(service_id):
     return render_template('views/service-settings/contact_link.html', form=form)
 
 
-@main.route("/services/<service_id>/service-settings/set-email", methods=['GET'])
-@login_required
-@user_has_permissions('manage_service')
-def service_set_email(service_id):
-    return render_template(
-        'views/service-settings/set-email.html',
-    )
-
-
 @main.route("/services/<service_id>/service-settings/set-reply-to-email", methods=['GET'])
 @login_required
 @user_has_permissions('manage_service')
@@ -484,15 +475,6 @@ def service_set_inbound_number(service_id):
     )
 
 
-@main.route("/services/<service_id>/service-settings/set-sms", methods=['GET'])
-@login_required
-@user_has_permissions('manage_service')
-def service_set_sms(service_id):
-    return render_template(
-        'views/service-settings/set-sms.html',
-    )
-
-
 @main.route("/services/<service_id>/service-settings/sms-prefix", methods=['GET', 'POST'])
 @login_required
 @user_has_permissions('manage_service')
@@ -546,23 +528,44 @@ def service_set_inbound_sms(service_id):
     )
 
 
-@main.route("/services/<service_id>/service-settings/set-letters", methods=['GET', 'POST'])
+@main.route("/services/<service_id>/service-settings/set-letters", methods=['GET'])
 @login_required
 @user_has_permissions('manage_service')
 def service_set_letters(service_id):
-    form = ServiceSwitchLettersForm(
-        enabled='on' if current_service.has_permission('letter') else 'off'
+    return redirect(
+        url_for(
+            '.service_set_channel',
+            service_id=current_service.id,
+            channel='letter',
+        ),
+        code=301,
     )
+
+
+@main.route("/services/<service_id>/service-settings/set-<channel>", methods=['GET', 'POST'])
+@login_required
+@user_has_permissions('manage_service')
+def service_set_channel(service_id, channel):
+
+    if channel not in {'email', 'sms', 'letter'}:
+        abort(404)
+
+    form = ServiceSwitchChannelForm(
+        channel=channel,
+        enabled='on' if current_service.has_permission(channel) else 'off'
+    )
+
     if form.validate_on_submit():
         current_service.force_permission(
-            'letter',
+            channel,
             on=(form.enabled.data == 'on'),
         )
         return redirect(
             url_for(".service_settings", service_id=service_id)
         )
+
     return render_template(
-        'views/service-settings/set-letters.html',
+        'views/service-settings/set-{}.html'.format(channel),
         form=form,
     )
 
diff --git a/app/navigation.py b/app/navigation.py
index 8cf8c514b..c207e98c3 100644
--- a/app/navigation.py
+++ b/app/navigation.py
@@ -227,8 +227,8 @@ class HeaderNavigation(Navigation):
         'service_name_change_confirm',
         'service_preview_email_branding',
         'service_set_auth_type',
+        'service_set_channel',
         'service_set_contact_link',
-        'service_set_email',
         'service_set_email_branding',
         'service_set_inbound_number',
         'service_set_inbound_sms',
@@ -237,7 +237,6 @@ class HeaderNavigation(Navigation):
         'service_set_letters',
         'service_set_postage',
         'service_set_reply_to_email',
-        'service_set_sms',
         'service_set_sms_prefix',
         'service_settings',
         'service_sms_senders',
@@ -354,8 +353,8 @@ class MainNavigation(Navigation):
             'service_name_change_confirm',
             'service_preview_email_branding',
             'service_set_auth_type',
+            'service_set_channel',
             'service_set_contact_link',
-            'service_set_email',
             'service_set_email_branding',
             'service_set_inbound_number',
             'service_set_inbound_sms',
@@ -364,7 +363,6 @@ class MainNavigation(Navigation):
             'service_set_letters',
             'service_set_postage',
             'service_set_reply_to_email',
-            'service_set_sms',
             'service_set_sms_prefix',
             'service_settings',
             'service_sms_senders',
@@ -690,8 +688,8 @@ class CaseworkNavigation(Navigation):
         'service_name_change_confirm',
         'service_preview_email_branding',
         'service_set_auth_type',
+        'service_set_channel',
         'service_set_contact_link',
-        'service_set_email',
         'service_set_email_branding',
         'service_set_inbound_number',
         'service_set_inbound_sms',
@@ -700,7 +698,6 @@ class CaseworkNavigation(Navigation):
         'service_set_letters',
         'service_set_postage',
         'service_set_reply_to_email',
-        'service_set_sms',
         'service_set_sms_prefix',
         'service_settings',
         'service_sms_senders',
@@ -926,8 +923,8 @@ class OrgNavigation(Navigation):
         'service_name_change_confirm',
         'service_preview_email_branding',
         'service_set_auth_type',
+        'service_set_channel',
         'service_set_contact_link',
-        'service_set_email',
         'service_set_email_branding',
         'service_set_inbound_number',
         'service_set_inbound_sms',
@@ -936,7 +933,6 @@ class OrgNavigation(Navigation):
         'service_set_letters',
         'service_set_postage',
         'service_set_reply_to_email',
-        'service_set_sms',
         'service_set_sms_prefix',
         'service_settings',
         'service_sms_senders',
diff --git a/app/templates/views/service-settings.html b/app/templates/views/service-settings.html
index 7da55d2b6..aed9e813e 100644
--- a/app/templates/views/service-settings.html
+++ b/app/templates/views/service-settings.html
@@ -71,12 +71,14 @@
           {{ text_field('Send emails') }}
           {{ boolean_field('email' in current_service.permissions) }}
           {{ edit_field(
-              'Change',
-              url_for('.service_set_email',
-              service_id=current_service.id),
-              permissions=['manage_service']
-              )
-          }}
+            'Change',
+            url_for(
+              '.service_set_channel',
+              channel='email',
+              service_id=current_service.id
+            ),
+            permissions=['manage_service']
+          )}}
         {% endcall %}
 
         {% call settings_row(if_has_permission='email') %}
@@ -121,12 +123,14 @@
           {{ text_field('Send text messages') }}
           {{ boolean_field('sms' in current_service.permissions) }}
           {{ edit_field(
-              'Change',
-              url_for('.service_set_sms',
-              service_id=current_service.id),
-              permissions=['manage_service']
-            )
-          }}
+            'Change',
+            url_for(
+              '.service_set_channel',
+              service_id=current_service.id,
+              channel='sms'
+            ),
+            permissions=['manage_service']
+          )}}
         {% endcall %}
 
         {% call settings_row(if_has_permission='sms') %}
@@ -197,12 +201,14 @@
           {{ text_field('Send letters') }}
           {{ boolean_field('letter' in current_service.permissions) }}
           {{ edit_field(
-              'Change',
-              url_for('.service_set_letters',
-              service_id=current_service.id),
-              permissions=['manage_service']
-          )
-          }}
+            'Change',
+            url_for(
+              '.service_set_channel',
+              channel='letter',
+              service_id=current_service.id
+            ),
+            permissions=['manage_service']
+          )}}
         {% endcall %}
 
         {% call settings_row(if_has_permission='letter') %}
diff --git a/app/templates/views/service-settings/set-email.html b/app/templates/views/service-settings/set-email.html
index 8ad86c3fb..e3bbfe4b9 100644
--- a/app/templates/views/service-settings/set-email.html
+++ b/app/templates/views/service-settings/set-email.html
@@ -1,37 +1,28 @@
 {% extends "withnav_template.html" %}
-{% from "components/textbox.html" import textbox %}
+{% from "components/form.html" import form_wrapper %}
 {% from "components/page-footer.html" import page_footer %}
+{% from "components/radios.html" import radios %}
 
 {% block service_page_title %}
-  Emails
+  Send emails
 {% endblock %}
 
 {% block maincolumn_content %}
 
   <div class="grid-row">
     <div class="column-five-sixths">
-      <h1 class="heading-large">Emails</h1>
-      {% if 'email' in current_service.permissions %}
-        <p>
-          Your service can send emails.
-        </p>
-        <p>
-          If you want to turn it off,
-          <a href="{{ url_for('.support') }}">get in touch with the GOV.UK Notify team</a>.
-        </p>
-      {% else %}
-        <p>
-          Sending emails is an invitation&#8209;only feature.
-        </p>
-        <p>
-          If you want to try it out,
-          <a href="{{ url_for('.support') }}">get in touch with the GOV.UK Notify team</a>.
-        </p>
-      {% endif %}
-      {{ page_footer(
-        back_link=url_for('.service_settings', service_id=current_service.id),
-        back_link_text='Back to settings'
-      ) }}
+      <h1 class="heading-large">Send emails</h1>
+      <p>
+        It’s free to send emails through GOV.UK Notify.
+      </p>
+      {% call form_wrapper() %}
+        {{ radios(form.enabled) }}
+        {{ page_footer(
+          'Save',
+          back_link=url_for('.service_settings', service_id=current_service.id),
+          back_link_text='Back to settings'
+        ) }}
+      {% endcall %}
     </div>
   </div>
 
diff --git a/app/templates/views/service-settings/set-letters.html b/app/templates/views/service-settings/set-letter.html
similarity index 100%
rename from app/templates/views/service-settings/set-letters.html
rename to app/templates/views/service-settings/set-letter.html
diff --git a/app/templates/views/service-settings/set-sms.html b/app/templates/views/service-settings/set-sms.html
index 61df15af0..8139013a9 100644
--- a/app/templates/views/service-settings/set-sms.html
+++ b/app/templates/views/service-settings/set-sms.html
@@ -1,37 +1,37 @@
 {% extends "withnav_template.html" %}
-{% from "components/textbox.html" import textbox %}
+{% from "components/form.html" import form_wrapper %}
 {% from "components/page-footer.html" import page_footer %}
+{% from "components/radios.html" import radios %}
 
 {% block service_page_title %}
-  Text messages
+  Send text messages
 {% endblock %}
 
 {% block maincolumn_content %}
 
   <div class="grid-row">
     <div class="column-five-sixths">
-      <h1 class="heading-large">Text messages</h1>
-      {% if 'sms' in current_service.permissions %}
-        <p>
-          Your service can send text messages.
-        </p>
-        <p>
-          If you want to turn it off,
-          <a href="{{ url_for('.support') }}">get in touch with the GOV.UK Notify team</a>.
-        </p>
-      {% else %}
-        <p>
-          Sending text messages is an invitation&#8209;only feature.
-        </p>
-        <p>
-          If you want to try it out,
-          <a href="{{ url_for('.support') }}">get in touch with the GOV.UK Notify team</a>.
-        </p>
-      {% endif %}
-      {{ page_footer(
-        back_link=url_for('.service_settings', service_id=current_service.id),
-        back_link_text='Back to settings'
-      ) }}
+      <h1 class="heading-large">Send text messages</h1>
+      <p>
+        You have a free allowance of
+        {{ '{:,}'.format(current_service.free_sms_fragment_limit) }} text messages each
+        financial year.
+      </p>
+      <p>
+        It costs 1.58 pence (plus VAT) for each text message you send
+        after your free allowance.
+      </p>
+      <p>
+        See <a href="{{ url_for(".pricing", _anchor="letters") }}">pricing</a> for more details.
+      </p>
+      {% call form_wrapper() %}
+        {{ radios(form.enabled) }}
+        {{ page_footer(
+          'Save',
+          back_link=url_for('.service_settings', service_id=current_service.id),
+          back_link_text='Back to settings'
+        ) }}
+      {% endcall %}
     </div>
   </div>
 
diff --git a/tests/app/main/views/test_service_settings.py b/tests/app/main/views/test_service_settings.py
index 123606001..48ba3a810 100644
--- a/tests/app/main/views/test_service_settings.py
+++ b/tests/app/main/views/test_service_settings.py
@@ -2542,19 +2542,91 @@ def test_should_set_sms_allowance(
     )
 
 
+def test_old_set_letters_page_redirects(
+    client_request,
+):
+    client_request.get(
+        'main.service_set_letters',
+        service_id=SERVICE_ONE_ID,
+        _expected_status=301,
+        _expected_redirect=url_for(
+            'main.service_set_channel',
+            service_id=SERVICE_ONE_ID,
+            channel='letter',
+            _external=True,
+        )
+    )
+
+
+def test_unknown_channel_404s(
+    client_request,
+):
+    client_request.get(
+        'main.service_set_channel',
+        service_id=SERVICE_ONE_ID,
+        channel='message-in-a-bottle',
+        _expected_status=404,
+    )
+
+
 @pytest.mark.parametrize((
+    'channel,'
+    'expected_first_para,'
+    'expected_legend,'
+    'initial_permissions,'
     'expected_initial_value,'
     'posted_value,'
-    'initial_permissions,'
     'expected_updated_permissions'
 ), [
-    ('off', 'on', ['email', 'sms'], ['email', 'sms', 'letter']),
-    ('on', 'off', ['email', 'sms', 'letter'], ['email', 'sms']),
+    (
+        'letter',
+        'It costs between 30p and 76p to send a letter using Notify.',
+        'Send letters',
+        ['email', 'sms'],
+        'off', 'on',
+        ['email', 'sms', 'letter'],
+    ),
+    (
+        'letter',
+        'It costs between 30p and 76p to send a letter using Notify.',
+        'Send letters',
+        ['email', 'sms', 'letter'],
+        'on', 'off',
+        ['email', 'sms'],
+    ),
+    (
+        'sms',
+        'You have a free allowance of 250,000 text messages each financial year.',
+        'Send text messages',
+        [],
+        'off', 'on',
+        ['sms'],
+    ),
+    (
+        'email',
+        'It’s free to send emails through GOV.UK Notify.',
+        'Send emails',
+        [],
+        'off', 'on',
+        ['email'],
+    ),
+    (
+        'email',
+        'It’s free to send emails through GOV.UK Notify.',
+        'Send emails',
+        ['email', 'sms', 'letter'],
+        'on', 'on',
+        ['email', 'sms', 'letter'],
+    ),
 ])
 def test_switch_service_enable_letters(
     client_request,
     service_one,
     mocker,
+    mock_get_free_sms_fragment_limit,
+    channel,
+    expected_first_para,
+    expected_legend,
     expected_initial_value,
     posted_value,
     initial_permissions,
@@ -2564,16 +2636,21 @@ def test_switch_service_enable_letters(
     service_one['permissions'] = initial_permissions
 
     page = client_request.get(
-        'main.service_set_letters',
+        'main.service_set_channel',
         service_id=service_one['id'],
+        channel=channel,
     )
 
+    assert normalize_spaces(page.select_one('main p').text) == expected_first_para
+    assert normalize_spaces(page.select_one('legend').text) == expected_legend
+
     assert page.select_one('input[checked]')['value'] == expected_initial_value
     assert len(page.select('input[checked]')) == 1
 
     client_request.post(
-        'main.service_set_letters',
+        'main.service_set_channel',
         service_id=service_one['id'],
+        channel=channel,
         _data={'enabled': posted_value},
         _expected_redirect=url_for(
             'main.service_settings',