diff --git a/examples/companion_radio/main.cpp b/examples/companion_radio/main.cpp
index 5d872303..3cee9a74 100644
--- a/examples/companion_radio/main.cpp
+++ b/examples/companion_radio/main.cpp
@@ -1775,10 +1775,10 @@ void loop() {
   // ---------------------------------------------------------------------------
   #ifdef MECK_TOUCH_ENABLED
   {
-    // Guard: skip touch when locked or VKB active (T5S3 only has these)
-    bool touchBlocked = false;
+    // Guard: skip touch when locked or VKB active
+    bool touchBlocked = ui_task.isLocked();
 #if defined(LilyGo_T5S3_EPaper_Pro)
-    touchBlocked = ui_task.isLocked() || ui_task.isVKBActive();
+    touchBlocked = touchBlocked || ui_task.isVKBActive();
 #endif
 
     if (!touchBlocked)
@@ -1950,6 +1950,10 @@ void handleKeyboardInput() {
   
   char key = keyboard.readKey();
   if (key == 0) return;
+
+  // Block all keyboard input while lock screen is active.
+  // Still read the key above to clear the TCA8418 buffer.
+  if (ui_task.isLocked()) return;
   
   Serial.printf("handleKeyboardInput: key='%c' (0x%02X) composeMode=%d\n", 
                 key >= 32 ? key : '?', key, composeMode);
diff --git a/examples/companion_radio/ui-new/UITask.cpp b/examples/companion_radio/ui-new/UITask.cpp
index 7df0c020..a529271d 100644
--- a/examples/companion_radio/ui-new/UITask.cpp
+++ b/examples/companion_radio/ui-new/UITask.cpp
@@ -1035,11 +1035,12 @@ public:
 };
 
 // ==========================================================================
-// Lock Screen — T5S3 only
-// Big clock, battery %, unread message count. Touch disabled while shown.
-// Long press boot button to lock/unlock. Touch disabled while locked.
+// Lock Screen — T5S3 and T-Deck Pro
+// Big clock, battery %, unread message count.
+// T5S3: Long press boot button to lock/unlock. Touch disabled while locked.
+// T-Deck Pro: Double-press boot button to lock/unlock. Touch+keyboard disabled.
 // ==========================================================================
-#if defined(LilyGo_T5S3_EPaper_Pro)
+#if defined(LilyGo_T5S3_EPaper_Pro) || defined(LilyGo_TDeck_Pro)
 class LockScreen : public UIScreen {
   UITask* _task;
   mesh::RTCClock* _rtc;
@@ -1063,7 +1064,11 @@ public:
     }
 
     // ---- Huge clock: HH:MM on one line ----
-    display.setTextSize(5);  // Clock face size (FreeSansBold24pt × 5)
+#if defined(LilyGo_T5S3_EPaper_Pro)
+    display.setTextSize(5);  // T5S3: FreeSansBold24pt × 5
+#else
+    display.setTextSize(5);  // T-Deck Pro: FreeSansBold12pt at GxEPD 2× scale
+#endif
     display.setColor(DisplayDriver::LIGHT);
     display.drawTextCentered(display.width() / 2, 55, timeBuf);
 
@@ -1092,7 +1097,11 @@ public:
     // ---- Unlock hint ----
     display.setTextSize(0);
     display.setColor(DisplayDriver::LIGHT);
+#if defined(LilyGo_T5S3_EPaper_Pro)
     display.drawTextCentered(display.width() / 2, 120, "Hold button to unlock");
+#else
+    display.drawTextCentered(display.width() / 2, 120, "Dbl-press to unlock");
+#endif
 
     return 30000;
   }
@@ -1101,7 +1110,7 @@ public:
     return false;
   }
 };
-#endif // LilyGo_T5S3_EPaper_Pro
+#endif
 
 void UITask::begin(DisplayDriver* display, SensorManager* sensors, NodePrefs* node_prefs) {
   _display = display;
@@ -1166,7 +1175,7 @@ void UITask::begin(DisplayDriver* display, SensorManager* sensors, NodePrefs* no
   settings_screen = new SettingsScreen(this, &rtc_clock, node_prefs);
   repeater_admin = nullptr;  // Lazy-initialized on first use to preserve heap for audio
   discovery_screen = new DiscoveryScreen(this, &rtc_clock);
-#if defined(LilyGo_T5S3_EPaper_Pro)
+#if defined(LilyGo_T5S3_EPaper_Pro) || defined(LilyGo_TDeck_Pro)
   lock_screen = new LockScreen(this, &rtc_clock, node_prefs);
 #endif
   audiobook_screen = nullptr;  // Created and assigned from main.cpp if audio hardware present
@@ -1436,6 +1445,13 @@ void UITask::loop() {
         c = 0;  // consumed
       }
     }
+#elif defined(LilyGo_TDeck_Pro)
+    // T-Deck Pro: single click ignored while locked — double-press to unlock
+    if (_locked) {
+      c = 0;
+    } else {
+      c = checkDisplayOn(KEY_NEXT);
+    }
 #else
     c = checkDisplayOn(KEY_NEXT);
 #endif
@@ -1702,6 +1718,14 @@ char UITask::handleDoubleClick(char c) {
     board.setBacklight(true);
   }
   c = 0;  // consume event — don't pass through as navigation
+#elif defined(LilyGo_TDeck_Pro)
+  // Double-click boot button → lock/unlock screen
+  if (_locked) {
+    unlockScreen();
+  } else {
+    lockScreen();
+  }
+  c = 0;
 #endif
   checkDisplayOn(c);
   return c;
@@ -1725,13 +1749,15 @@ char UITask::handleTripleClick(char c) {
   return c;
 }
 
-#if defined(LilyGo_T5S3_EPaper_Pro)
+#if defined(LilyGo_T5S3_EPaper_Pro) || defined(LilyGo_TDeck_Pro)
 void UITask::lockScreen() {
   if (_locked) return;
   _locked = true;
   _screenBeforeLock = curr;
   setCurrScreen(lock_screen);
-  board.setBacklight(false);  // Save power
+#if defined(LilyGo_T5S3_EPaper_Pro)
+  board.setBacklight(false);  // Save power (T5S3 backlight)
+#endif
   _next_refresh = 0;  // Draw lock screen immediately
   _auto_off = millis() + 60000;  // 60s before display off while locked
   Serial.println("[UI] Screen locked");
@@ -1750,7 +1776,9 @@ void UITask::unlockScreen() {
   _next_refresh = 0;
   Serial.println("[UI] Screen unlocked");
 }
+#endif // LilyGo_T5S3_EPaper_Pro || LilyGo_TDeck_Pro
 
+#if defined(LilyGo_T5S3_EPaper_Pro)
 void UITask::showVirtualKeyboard(VKBPurpose purpose, const char* label, const char* initial, int maxLen, int contextIdx) {
   _vkb.open(purpose, label, initial, maxLen, contextIdx);
   _vkbActive = true;
diff --git a/examples/companion_radio/ui-new/UITask.h b/examples/companion_radio/ui-new/UITask.h
index 088f7773..e549f49a 100644
--- a/examples/companion_radio/ui-new/UITask.h
+++ b/examples/companion_radio/ui-new/UITask.h
@@ -100,6 +100,10 @@ class UITask : public AbstractUITask {
   bool _vkbActive = false;
   UIScreen* _screenBeforeVKB = nullptr;
   unsigned long _vkbOpenedAt = 0;
+#elif defined(LilyGo_TDeck_Pro)
+  UIScreen* lock_screen;     // Lock screen (big clock + battery + unread)
+  UIScreen* _screenBeforeLock = nullptr;
+  bool _locked = false;
 #endif
 
   void userLedHandler();
@@ -174,10 +178,12 @@ public:
   bool isOnRepeaterAdmin() const { return curr == repeater_admin; }
   bool isOnDiscoveryScreen() const { return curr == discovery_screen; }
   bool isOnMapScreen() const { return curr == map_screen; }
-#if defined(LilyGo_T5S3_EPaper_Pro)
+#if defined(LilyGo_T5S3_EPaper_Pro) || defined(LilyGo_TDeck_Pro)
   bool isLocked() const { return _locked; }
   void lockScreen();
   void unlockScreen();
+#endif
+#if defined(LilyGo_T5S3_EPaper_Pro)
   bool isVKBActive() const { return _vkbActive; }
   unsigned long vkbOpenedAt() const { return _vkbOpenedAt; }
   VirtualKeyboard& getVKB() { return _vkb; }
diff --git a/src/helpers/ui/GxEPDDisplay.cpp b/src/helpers/ui/GxEPDDisplay.cpp
index a9d5b7e0..a8ef757d 100644
--- a/src/helpers/ui/GxEPDDisplay.cpp
+++ b/src/helpers/ui/GxEPDDisplay.cpp
@@ -100,15 +100,23 @@ void GxEPDDisplay::setTextSize(int sz) {
       break;
     case 1:  // Small - use 9pt (was 9pt)
       display.setFont(&FreeSans9pt7b);
+      display.setTextSize(1);
       break;
     case 2:  // Medium Bold - use 9pt bold instead of 12pt
       display.setFont(&FreeSans9pt7b);
+      display.setTextSize(1);
       break;
     case 3:  // Large - use 12pt instead of 18pt
       display.setFont(&FreeSansBold12pt7b);
+      display.setTextSize(1);
+      break;
+    case 5:  // Extra Large - lock screen clock face
+      display.setFont(&FreeSansBold12pt7b);
+      display.setTextSize(2);  // GxEPD2 native 2× scaling on 12pt bold
       break;
     default:
       display.setFont(&FreeSans9pt7b);
+      display.setTextSize(1);
       break;
   }
 }