diff --git a/homeassistant/components/sms/sensor.py b/homeassistant/components/sms/sensor.py
index cfa31d56e80..0ad727faf2c 100644
--- a/homeassistant/components/sms/sensor.py
+++ b/homeassistant/components/sms/sensor.py
@@ -17,7 +17,6 @@ from .const import DOMAIN, GATEWAY, NETWORK_COORDINATOR, SIGNAL_COORDINATOR, SMS
 SIGNAL_SENSORS = (
     SensorEntityDescription(
         key="SignalStrength",
-        translation_key="signal_strength",
         device_class=SensorDeviceClass.SIGNAL_STRENGTH,
         entity_category=EntityCategory.DIAGNOSTIC,
         native_unit_of_measurement=SIGNAL_STRENGTH_DECIBELS,
diff --git a/homeassistant/components/sms/strings.json b/homeassistant/components/sms/strings.json
index c005c241d79..ae3324aa156 100644
--- a/homeassistant/components/sms/strings.json
+++ b/homeassistant/components/sms/strings.json
@@ -38,9 +38,6 @@
       "signal_percent": {
         "name": "Signal percent"
       },
-      "signal_strength": {
-        "name": "[%key:component::sensor::entity_component::signal_strength::name%]"
-      },
       "state": {
         "name": "Network status"
       }