diff --git a/check_modem.py b/check_modem.py
index 923f019..0eef40b 100755
--- a/check_modem.py
+++ b/check_modem.py
@@ -61,9 +61,13 @@ if __name__ == "__main__":
     status['state_text'] = MMModemState(status['state']).name
 
     # return code: if registered and signal > 0, return 0
-    if modem.GetStatus()["state"] in [ MMModemState.REGISTERED, MMModemState.CONNECTED ] and modem.SignalQuality[0] > 0 and modem.RegistrationState == 1:
-        print("OK: ", end='')
-        exit_code = 0
+    if modem.GetStatus()["state"] in [ MMModemState.REGISTERED, MMModemState.CONNECTED ] and modem.SignalQuality[0] > 0:
+        if modem.RegistrationState == 1:
+            print("OK: ", end='')
+            exit_code = 0
+        else:
+            print("WARNING: Registration state is not HOME - ", end='')
+            exit_code = 1
     elif modem.GetStatus()["state"] in [ MMModemState.INITIALIZING, MMModemState.ENABLED, MMModemState.SEARCHING, MMModemState.DISCONNECTING ]:
         print("WARNING: ", end='')
         exit_code = 1