diff --git a/assets/js/cat.js b/assets/js/cat.js
index 9b00b0ff2..f69e344fc 100644
--- a/assets/js/cat.js
+++ b/assets/js/cat.js
@@ -756,6 +756,10 @@ $(document).ready(function() {
                     // Auto-update band based on frequency
                     if ($band.val() != newBand) {
                         $band.val(newBand).trigger('change'); // Trigger band change
+                        // Update callsign status when band changes via CAT
+                        if ($('#callsign').val().length >= 3) {
+                            $('#callsign').blur();
+                        }
                     }
                 });
             });
@@ -766,6 +770,10 @@ $(document).ready(function() {
                 // Auto-update band based on frequency
                 if ($band.val() != frequencyToBand(d)) {
                     $band.val(frequencyToBand(d)).trigger('change');
+                    // Update callsign status when band changes via CAT
+                    if ($('#callsign').val().length >= 3) {
+                        $('#callsign').blur();
+                    }
                 }
             });
         }
@@ -795,6 +803,10 @@ $(document).ready(function() {
         var currentMode = $mode.data('catValue');
         if (currentMode !== previousMode && typeof setRst === 'function') {
             setRst(newMode);
+            // Update callsign status when mode changes via CAT
+            if ($('#callsign').val().length >= 3) {
+                $('#callsign').blur();
+            }
         }
 
         // Notify DX Waterfall of mode change for sideband display update
diff --git a/assets/js/sections/qso.js b/assets/js/sections/qso.js
index cad646487..b245a148d 100644
--- a/assets/js/sections/qso.js
+++ b/assets/js/sections/qso.js
@@ -2372,6 +2372,21 @@ $('#band').on('change', function () {
 	if ($('#radio').val() == 0) {
 		$.get(base_url + 'index.php/qso/band_to_freq/' + $(this).val() + '/' + $('.mode').val(), function (result) {
 			$('#frequency').val(result).trigger("change");
+
+			// Update virtual CAT state when not using CAT
+			if (typeof isCATAvailable === 'function' && !isCATAvailable()) {
+				if (typeof window.catState === 'undefined' || window.catState === null) {
+					window.catState = {};
+				}
+				window.catState.frequency = parseFloat(result); // Hz
+				window.catState.mode = $('.mode').val();
+				window.catState.lastUpdate = Date.now();
+
+				// Update relevant spots for the new band/frequency
+				if (typeof dxWaterfall !== 'undefined' && dxWaterfall && typeof dxWaterfall.collectAllBandSpots === 'function') {
+					dxWaterfall.collectAllBandSpots(true);
+				}
+			}
 		});
 	}
 	$('#frequency_rx').val("");
@@ -2382,20 +2397,6 @@ $('#band').on('change', function () {
 	set_qrg();
 	$("#callsign").blur();
 	stop_az_ele_ticker();
-    if (typeof isCATAvailable === 'function' && !isCATAvailable()) {
-        // Update virtual CAT state
-        if (typeof window.catState === 'undefined' || window.catState === null) {
-            window.catState = {};
-        }
-        window.catState.frequency = parseFloat(result); // Hz
-        window.catState.mode = currentMode;
-        window.catState.lastUpdate = Date.now();
-
-        // Update relevant spots for the new band/frequency
-        if (typeof dxWaterfall !== 'undefined' && dxWaterfall && typeof dxWaterfall.collectAllBandSpots === 'function') {
-            dxWaterfall.collectAllBandSpots(true);
-        }
-    }
 });
 
 /* On Key up Calculate Bearing and Distance */