diff --git a/telethon/network/connection/connection.py b/telethon/network/connection/connection.py
index 5fce6f11..e61f8720 100644
--- a/telethon/network/connection/connection.py
+++ b/telethon/network/connection/connection.py
@@ -127,7 +127,6 @@ class Connection(abc.ABC):
         else:
             raise result from None
 
-    # TODO Get/put to the queue with cancellation
     async def _send_loop(self):
         """
         This loop is constantly popping items off the queue to send them.
diff --git a/telethon/network/mtprotolayer.py b/telethon/network/mtprotolayer.py
index 731cabb8..3c21877b 100644
--- a/telethon/network/mtprotolayer.py
+++ b/telethon/network/mtprotolayer.py
@@ -1,10 +1,13 @@
 import io
+import logging
 import struct
 
 from .mtprotostate import MTProtoState
 from ..tl import TLRequest
 from ..tl.core.messagecontainer import MessageContainer
 
+__log__ = logging.getLogger(__name__)
+
 
 class MTProtoLayer:
     """
@@ -64,7 +67,6 @@ class MTProtoLayer:
         nested inside another message and message container) and
         returns the serialized message data.
         """
-        # TODO write_data_as_message raises on invalid messages, handle it
         # TODO This method could be an iterator yielding messages while small
         # respecting the ``MessageContainer.MAXIMUM_SIZE`` limit.
         #
@@ -84,6 +86,10 @@ class MTProtoLayer:
                 n += 1
                 state.msg_id = self._state.write_data_as_message(
                     buffer, state.data, isinstance(state.request, TLRequest))
+
+                __log__.debug('Assigned msg_id = %d to %s (%x)',
+                              state.msg_id, state.request.__class__.__name__,
+                              id(state.request))
             else:
                 last_id = None
                 for s in state:
@@ -92,6 +98,9 @@ class MTProtoLayer:
                         buffer, s.data, isinstance(s.request, TLRequest),
                         after_id=last_id)
 
+                    __log__.debug('Assigned msg_id = %d to %s (%x)',
+                                  s.msg_id, s.request.__class__.__name__,
+                                  id(s.request))
         if n > 1:
             # Inlined code to pack several messages into a container
             #
@@ -112,7 +121,9 @@ class MTProtoLayer:
                     for s in state:
                         s.container_id = container_id
 
-        return buffer.getvalue()
+        r = buffer.getvalue()
+        __log__.debug('Packed %d message(s) in %d bytes for sending', n, len(r))
+        return r
 
     def __str__(self):
         return str(self._connection)
diff --git a/telethon/network/mtprotosender.py b/telethon/network/mtprotosender.py
index 4d96cb2c..29869a63 100644
--- a/telethon/network/mtprotosender.py
+++ b/telethon/network/mtprotosender.py
@@ -343,7 +343,6 @@ class MTProtoSender:
             if state_list is None:
                 break
 
-            # TODO Debug logs to notify which messages are being sent
             # TODO Try sending them while no future was cancelled?
             # TODO Handle cancelled?, arbitrary errors
             await self._connection.send(state_list)
@@ -362,7 +361,6 @@ class MTProtoSender:
         Besides `connect`, only this method ever receives data.
         """
         while self._user_connected and not self._reconnecting:
-            # TODO handle incomplete read?
             __log__.debug('Receiving items from the network...')
             try:
                 message = await self._connection.recv()