diff --git a/homeassistant/components/modem_callerid/const.py b/homeassistant/components/modem_callerid/const.py
index 0b01c3b761f..d144e2afd5c 100644
--- a/homeassistant/components/modem_callerid/const.py
+++ b/homeassistant/components/modem_callerid/const.py
@@ -8,7 +8,6 @@ DATA_KEY_API = "api"
 DEFAULT_NAME = "Phone Modem"
 DOMAIN = "modem_callerid"
 ICON = "mdi:phone-classic"
-SERVICE_REJECT_CALL = "reject_call"
 
 EXCEPTIONS: Final = (
     FileNotFoundError,
diff --git a/homeassistant/components/modem_callerid/sensor.py b/homeassistant/components/modem_callerid/sensor.py
index f4b2f3c3e44..e50eabb17aa 100644
--- a/homeassistant/components/modem_callerid/sensor.py
+++ b/homeassistant/components/modem_callerid/sensor.py
@@ -7,11 +7,11 @@ from phone_modem import PhoneModem
 
 from homeassistant.components.sensor import SensorEntity
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_DEVICE, EVENT_HOMEASSISTANT_STOP, STATE_IDLE
+from homeassistant.const import EVENT_HOMEASSISTANT_STOP, STATE_IDLE
 from homeassistant.core import Event, HomeAssistant, callback
 from homeassistant.helpers import entity_platform
 
-from .const import CID, DATA_KEY_API, DOMAIN, ICON, SERVICE_REJECT_CALL
+from .const import CID, DATA_KEY_API, DOMAIN, ICON
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -28,7 +28,6 @@ async def async_setup_entry(
             ModemCalleridSensor(
                 api,
                 entry.title,
-                entry.data[CONF_DEVICE],
                 entry.entry_id,
             )
         ]
@@ -43,9 +42,6 @@ async def async_setup_entry(
         hass.bus.async_listen_once(EVENT_HOMEASSISTANT_STOP, _async_on_hass_stop)
     )
 
-    platform = entity_platform.async_get_current_platform()
-    platform.async_register_entity_service(SERVICE_REJECT_CALL, {}, "async_reject_call")
-
 
 class ModemCalleridSensor(SensorEntity):
     """Implementation of USB modem caller ID sensor."""
@@ -53,11 +49,8 @@ class ModemCalleridSensor(SensorEntity):
     _attr_icon = ICON
     _attr_should_poll = False
 
-    def __init__(
-        self, api: PhoneModem, name: str, device: str, server_unique_id: str
-    ) -> None:
+    def __init__(self, api: PhoneModem, name: str, server_unique_id: str) -> None:
         """Initialize the sensor."""
-        self.device = device
         self.api = api
         self._attr_name = name
         self._attr_unique_id = server_unique_id
@@ -85,12 +78,3 @@ class ModemCalleridSensor(SensorEntity):
             self._attr_extra_state_attributes[CID.CID_TIME] = self.api.cid_time
         self._attr_native_value = self.api.state
         self.async_write_ha_state()
-
-    async def async_reject_call(self) -> None:
-        """Reject Incoming Call."""
-        _LOGGER.warning(
-            "Calling reject_call service is deprecated and will be removed after 2022.4; "
-            "A new button entity is now available with the same function "
-            "and replaces the existing service"
-        )
-        await self.api.reject_call(self.device)