diff --git a/bumble/controller.py b/bumble/controller.py
index 9113a861..356b7e42 100644
--- a/bumble/controller.py
+++ b/bumble/controller.py
@@ -618,8 +618,8 @@ class Controller:
                 cis_sync_delay=0,
                 transport_latency_c_to_p=0,
                 transport_latency_p_to_c=0,
-                phy_c_to_p=0,
-                phy_p_to_c=0,
+                phy_c_to_p=1,
+                phy_p_to_c=1,
                 nse=0,
                 bn_c_to_p=0,
                 bn_p_to_c=0,
diff --git a/bumble/device.py b/bumble/device.py
index 3eeed842..ad03dacb 100644
--- a/bumble/device.py
+++ b/bumble/device.py
@@ -1710,6 +1710,8 @@ class Connection(utils.CompositeEventEmitter):
     pairing_peer_authentication_requirements: Optional[int]
     cs_configs: dict[int, ChannelSoundingConfig]  # Config ID to Configuration
     cs_procedures: dict[int, ChannelSoundingProcedure]  # Config ID to Procedures
+    classic_mode: int = hci.HCI_Mode_Change_Event.Mode.ACTIVE
+    classic_interval: int = 0
 
     EVENT_CONNECTION_ATT_MTU_UPDATE = "connection_att_mtu_update"
     EVENT_DISCONNECTION = "disconnection"
@@ -1736,6 +1738,8 @@ class Connection(utils.CompositeEventEmitter):
     EVENT_CHANNEL_SOUNDING_CONFIG_REMOVED = "channel_sounding_config_removed"
     EVENT_CHANNEL_SOUNDING_PROCEDURE_FAILURE = "channel_sounding_procedure_failure"
     EVENT_CHANNEL_SOUNDING_PROCEDURE = "channel_sounding_procedure"
+    EVENT_MODE_CHANGE = "mode_change"
+    EVENT_MODE_CHANGE_FAILURE = "mode_change_failure"
     EVENT_ROLE_CHANGE = "role_change"
     EVENT_ROLE_CHANGE_FAILURE = "role_change_failure"
     EVENT_CLASSIC_PAIRING = "classic_pairing"
@@ -5888,7 +5892,7 @@ class Device(utils.CompositeEventEmitter):
             connection.classic_interval = interval
             connection.emit(connection.EVENT_MODE_CHANGE)
         else:
-            connection.emit(connection.EVENT_MODE_CHANGE_FAILURE)
+            connection.emit(connection.EVENT_MODE_CHANGE_FAILURE, status)
 
     # [Classic only]
     @host_event_handler
diff --git a/bumble/hci.py b/bumble/hci.py
index 55c6448b..a340bd5b 100644
--- a/bumble/hci.py
+++ b/bumble/hci.py
@@ -4990,7 +4990,9 @@ class HCI_LE_Set_Privacy_Mode_Command(HCI_Command):
         NETWORK_PRIVACY_MODE = 0x00
         DEVICE_PRIVACY_MODE = 0x01
 
-    peer_identity_address_type: int = field(metadata=Address.ADDRESS_TYPE_SPEC)
+    peer_identity_address_type: int = field(
+        metadata=metadata(Address.ADDRESS_TYPE_SPEC)
+    )
     peer_identity_address: Address = field(
         metadata=metadata(Address.parse_address_preceded_by_type)
     )
diff --git a/bumble/host.py b/bumble/host.py
index 817485a8..bfbe283c 100644
--- a/bumble/host.py
+++ b/bumble/host.py
@@ -1392,6 +1392,15 @@ class Host(utils.EventEmitter):
     def on_hci_synchronous_connection_changed_event(self, event):
         pass
 
+    def on_hci_mode_change_event(self, event: hci.HCI_Mode_Change_Event):
+        self.emit(
+            'mode_change',
+            event.connection_handle,
+            event.status,
+            event.current_mode,
+            event.interval,
+        )
+
     def on_hci_role_change_event(self, event):
         if event.status == hci.HCI_SUCCESS:
             logger.debug(
diff --git a/pyproject.toml b/pyproject.toml
index 9474cd18..7c788754 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ dynamic = ["version"]
 description = "Bluetooth Stack for Apps, Emulation, Test and Experimentation"
 readme = "README.md"
 authors = [{ name = "Google", email = "bumble-dev@google.com" }]
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 dependencies = [
     "aiohttp ~= 3.8; platform_system!='Emscripten'",
     "appdirs >= 1.4; platform_system!='Emscripten'",
diff --git a/tests/device_test.py b/tests/device_test.py
index c3f70e30..8d0b5ade 100644
--- a/tests/device_test.py
+++ b/tests/device_test.py
@@ -581,8 +581,12 @@ async def test_enter_and_exit_sniff_mode():
     devices = TwoDevices()
     await devices.setup_connection()
 
-    m = mock.Mock()
-    devices.connections[0].on(Connection.EVENT_MODE_CHANGE, m)
+    q = asyncio.Queue()
+
+    def on_mode_change():
+        q.put_nowait(lambda: None)
+
+    devices.connections[0].on(Connection.EVENT_MODE_CHANGE, on_mode_change)
 
     await devices[0].send_command(
         hci.HCI_Sniff_Mode_Command(
@@ -594,7 +598,7 @@ async def test_enter_and_exit_sniff_mode():
         ),
     )
 
-    m.assert_called_once()
+    await asyncio.wait_for(q.get(), _TIMEOUT)
     assert devices.connections[0].classic_mode == hci.HCI_Mode_Change_Event.Mode.SNIFF
     assert devices.connections[0].classic_interval == 2
 
@@ -602,6 +606,7 @@ async def test_enter_and_exit_sniff_mode():
         hci.HCI_Exit_Sniff_Mode_Command(connection_handle=devices.connections[0].handle)
     )
 
+    await asyncio.wait_for(q.get(), _TIMEOUT)
     assert devices.connections[0].classic_mode == hci.HCI_Mode_Change_Event.Mode.ACTIVE
     assert devices.connections[0].classic_interval == 2