diff --git a/src/app/features/call/CallControls.tsx b/src/app/features/call/CallControls.tsx
index f750bf533..d0971cc8b 100644
--- a/src/app/features/call/CallControls.tsx
+++ b/src/app/features/call/CallControls.tsx
@@ -64,13 +64,16 @@ export function CallControls({ callEmbed }: CallControlsProps) {
   const microphoneRef = useRef(microphone);
   useEffect(() => { microphoneRef.current = microphone; }, [microphone]);
 
-  // Handle PTT mode toggle mid-call
+  // Handle PTT mode toggle mid-call — save/restore mic state (I-4)
   const pttModeRef = useRef(pttMode);
+  const micBeforePTTRef = useRef<boolean | null>(null);
   useEffect(() => {
     if (pttMode && !pttModeRef.current) {
+      micBeforePTTRef.current = microphoneRef.current;
       callEmbed.control.setMicrophone(false);
     } else if (!pttMode && pttModeRef.current) {
-      callEmbed.control.setMicrophone(true);
+      callEmbed.control.setMicrophone(micBeforePTTRef.current ?? true);
+      micBeforePTTRef.current = null;
     }
     pttModeRef.current = pttMode;
   }, [pttMode, callEmbed]);