diff --git a/esphome/components/modem/helpers.cpp b/esphome/components/modem/helpers.cpp
index 07ae746271..73b387918a 100644
--- a/esphome/components/modem/helpers.cpp
+++ b/esphome/components/modem/helpers.cpp
@@ -131,7 +131,7 @@ std::string get_signal_bars(float rssi, bool color) {
 
   if (!color) {
     if (std::isnan(rssi)) {
-      return {};
+      return "None";
     } else if (rssi >= -50) {
       return "High";
     } else if (rssi >= -65) {
diff --git a/esphome/components/modem/sensor/modem_sensor.cpp b/esphome/components/modem/sensor/modem_sensor.cpp
index b5c4a3c6b6..14d9b190a5 100644
--- a/esphome/components/modem/sensor/modem_sensor.cpp
+++ b/esphome/components/modem/sensor/modem_sensor.cpp
@@ -141,7 +141,7 @@ void ModemSensor::update_gnss_sensors_() {
     std::map<std::string, std::string> parts;
     auto at_command_result = global_modem_component->send_at("AT+CGNSSINFO");
     if (at_command_result) {
-      std::string gnss_info = at_command_result.result;
+      std::string gnss_info = at_command_result.output;
       parts = get_gnssinfo_tokens(gnss_info);
     }
 
diff --git a/esphome/components/modem/sensor/modem_sensor.h b/esphome/components/modem/sensor/modem_sensor.h
index 5f41593768..c5a40dd1d4 100644
--- a/esphome/components/modem/sensor/modem_sensor.h
+++ b/esphome/components/modem/sensor/modem_sensor.h
@@ -28,7 +28,7 @@ class ModemSensor : public PollingComponent {
   // ========== INTERNAL METHODS ==========
   // (In most use cases you won't need these)
 
-  float get_setup_priority() const override { return setup_priority::AFTER_WIFI; }
+  float get_setup_priority() const override { return setup_priority::AFTER_CONNECTION; }
   void setup() override;
   void update() override;
   void dump_config() override {}
diff --git a/esphome/components/modem/switch/gnns_switch.h b/esphome/components/modem/switch/gnns_switch.h
index a80c42f486..4e42df240f 100644
--- a/esphome/components/modem/switch/gnns_switch.h
+++ b/esphome/components/modem/switch/gnns_switch.h
@@ -20,7 +20,7 @@ class GnssSwitch : public switch_::Switch, public Component {
   // ========== INTERNAL METHODS ==========
   // (In most use cases you won't need these)
 
-  float get_setup_priority() const override { return setup_priority::AFTER_WIFI; }
+  float get_setup_priority() const override { return setup_priority::AFTER_CONNECTION; }
   void dump_config() override;
   void setup() override;
   void loop() override;
diff --git a/esphome/components/modem/text_sensor/__init__.py b/esphome/components/modem/text_sensor/__init__.py
index 560796a21e..7136f42367 100644
--- a/esphome/components/modem/text_sensor/__init__.py
+++ b/esphome/components/modem/text_sensor/__init__.py
@@ -26,6 +26,7 @@ CONFIG_SCHEMA = cv.All(
             ),
             cv.Optional(CONF_SIGNAL_STRENGTH): text_sensor.text_sensor_schema(
                 device_class=DEVICE_CLASS_EMPTY,
+                icon="mdi:signal",
             ),
         }
     )