diff --git a/app/dao/service_sms_sender_dao.py b/app/dao/service_sms_sender_dao.py
index 4b89b7e8d..fcb5ff92c 100644
--- a/app/dao/service_sms_sender_dao.py
+++ b/app/dao/service_sms_sender_dao.py
@@ -5,26 +5,6 @@ from app.dao.dao_utils import transactional
 from app.models import ServiceSmsSender
 
 
-@transactional
-def insert_or_update_service_sms_sender(service, sms_sender, inbound_number_id=None):
-    result = db.session.query(
-        ServiceSmsSender
-    ).filter(
-        ServiceSmsSender.service_id == service.id
-    ).update(
-        {'sms_sender': sms_sender,
-         'inbound_number_id': inbound_number_id
-         }
-    )
-    if result == 0:
-        new_sms_sender = ServiceSmsSender(sms_sender=sms_sender,
-                                          service=service,
-                                          is_default=True,
-                                          inbound_number_id=inbound_number_id
-                                          )
-        db.session.add(new_sms_sender)
-
-
 def insert_service_sms_sender(service, sms_sender):
     """
     This method is called from create_service which is wrapped in a transaction.
diff --git a/app/models.py b/app/models.py
index 316667149..4ff22131c 100644
--- a/app/models.py
+++ b/app/models.py
@@ -223,7 +223,6 @@ class Service(db.Model, Versioned):
     created_by_id = db.Column(UUID(as_uuid=True), db.ForeignKey('users.id'), index=True, nullable=False)
     _reply_to_email_address = db.Column("reply_to_email_address", db.Text, index=False, unique=False, nullable=True)
     _letter_contact_block = db.Column('letter_contact_block', db.Text, index=False, unique=False, nullable=True)
-    sms_sender = db.Column(db.String(11), nullable=True)
     prefix_sms = db.Column(db.Boolean, nullable=True, default=True)
     organisation_id = db.Column(UUID(as_uuid=True), db.ForeignKey('organisation.id'), index=True, nullable=True)
     free_sms_fragment_limit = db.Column(db.BigInteger, index=False, unique=False, nullable=True)