diff --git a/homeassistant/components/sms/icons.json b/homeassistant/components/sms/icons.json
new file mode 100644
index 00000000000..f863d7a35a4
--- /dev/null
+++ b/homeassistant/components/sms/icons.json
@@ -0,0 +1,12 @@
+{
+  "entity": {
+    "sensor": {
+      "signal_percent": {
+        "default": "mdi:signal-cellular-3"
+      },
+      "cid": {
+        "default": "mdi:radio-tower"
+      }
+    }
+  }
+}
diff --git a/homeassistant/components/sms/sensor.py b/homeassistant/components/sms/sensor.py
index d4c45b83d82..2f5ce7b7da3 100644
--- a/homeassistant/components/sms/sensor.py
+++ b/homeassistant/components/sms/sensor.py
@@ -25,7 +25,6 @@ SIGNAL_SENSORS = (
     ),
     SensorEntityDescription(
         key="SignalPercent",
-        icon="mdi:signal-cellular-3",
         translation_key="signal_percent",
         native_unit_of_measurement=PERCENTAGE,
         entity_registry_enabled_default=True,
@@ -62,7 +61,6 @@ NETWORK_SENSORS = (
     SensorEntityDescription(
         key="CID",
         translation_key="cid",
-        icon="mdi:radio-tower",
         entity_category=EntityCategory.DIAGNOSTIC,
         entity_registry_enabled_default=False,
     ),