diff --git a/voice.py b/voice.py
index a0b1076..a54734f 100644
--- a/voice.py
+++ b/voice.py
@@ -258,22 +258,23 @@ class VoiceSession:
                         len(self.lk_room.remote_participants))
 
             # Element Call rotates its encryption key when bot joins the LiveKit room.
-            # We fetched the pre-join key above; now wait for EC to generate and publish
-            # the post-join rotated key via Matrix timeline.
+            # EC sends the new key via Matrix (Megolm-encrypted); nio sync will decrypt it
+            # and call on_encryption_key(), which updates self._caller_all_keys.
+            # NOTE: HTTP fetch is useless here — keys are Matrix-E2EE encrypted (m.room.encrypted).
             pre_max_idx = max(self._caller_all_keys.keys()) if self._caller_all_keys else -1
-            logger.info("Polling for EC key rotation (pre-join max_idx=%d)...", pre_max_idx)
-            for _attempt in range(10):  # poll up to 5s (10 × 0.5s)
+            logger.info("Waiting for EC key rotation via nio sync (current max_idx=%d)...", pre_max_idx)
+            for _attempt in range(20):  # up to 10s (20 × 0.5s)
                 await asyncio.sleep(0.5)
-                await self._fetch_encryption_key_http()
                 new_max = max(self._caller_all_keys.keys()) if self._caller_all_keys else -1
                 if new_max > pre_max_idx:
                     self._caller_key = self._caller_all_keys[new_max]
                     logger.info("Key rotated: index %d→%d (%d bytes)",
                                 pre_max_idx, new_max, len(self._caller_key))
                     break
-                logger.debug("Key rotation poll %d: max_idx still %d", _attempt + 1, new_max)
+                if _attempt % 4 == 3:  # log every 2s
+                    logger.info("Key rotation wait %ds: max_idx still %d", (_attempt + 1) // 2, new_max)
             else:
-                logger.warning("No key rotation after 5s — using pre-join key[%d]", pre_max_idx)
+                logger.warning("No key rotation after 10s — using pre-join key[%d]", pre_max_idx)
 
             # Set per-participant keys via key provider
             kp = self.lk_room.e2ee_manager.key_provider