diff --git a/telethon/_client/users.py b/telethon/_client/users.py
index b44564e1..d47fab67 100644
--- a/telethon/_client/users.py
+++ b/telethon/_client/users.py
@@ -40,7 +40,7 @@ async def _call(self: 'TelegramClient', sender, request, ordered=False, flood_sl
     for r in requests:
         if not isinstance(r, _tl.TLRequest):
             raise _NOT_A_REQUEST()
-        r = await r.resolve(self, utils)
+        r = await r._resolve(self, utils)
 
         # Avoid making the request if it's already in a flood wait
         if r.CONSTRUCTOR_ID in self._flood_waited_requests:
diff --git a/telethon/_crypto/rsa.py b/telethon/_crypto/rsa.py
index eca09743..fcfaca48 100644
--- a/telethon/_crypto/rsa.py
+++ b/telethon/_crypto/rsa.py
@@ -41,8 +41,8 @@ def _compute_fingerprint(key):
     :param key: the Crypto.RSA key.
     :return: its 8-bytes-long fingerprint.
     """
-    n = tlobject.TLObject.serialize_bytes(get_byte_array(key.n))
-    e = tlobject.TLObject.serialize_bytes(get_byte_array(key.e))
+    n = tlobject.TLObject._serialize_bytes(get_byte_array(key.n))
+    e = tlobject.TLObject._serialize_bytes(get_byte_array(key.e))
     # Telegram uses the last 8 bytes as the fingerprint
     return struct.unpack('<q', sha1(n + e).digest()[-8:])[0]
 
diff --git a/telethon/_misc/binaryreader.py b/telethon/_misc/binaryreader.py
index 4117653f..b4690871 100644
--- a/telethon/_misc/binaryreader.py
+++ b/telethon/_misc/binaryreader.py
@@ -139,7 +139,7 @@ class BinaryReader:
                 self.set_position(pos)
                 raise error
 
-        return clazz.from_reader(self)
+        return clazz._from_reader(self)
 
     def tgread_vector(self):
         """Reads a vector (a list) of Telegram objects."""
diff --git a/telethon/_misc/tlobject.py b/telethon/_misc/tlobject.py
index 397dc1b0..68aa6837 100644
--- a/telethon/_misc/tlobject.py
+++ b/telethon/_misc/tlobject.py
@@ -38,7 +38,7 @@ class TLObject:
     SUBCLASS_OF_ID = None
 
     @staticmethod
-    def serialize_bytes(data):
+    def _serialize_bytes(data):
         """Write bytes by using Telegram guidelines"""
         if not isinstance(data, bytes):
             if isinstance(data, str):
@@ -73,7 +73,7 @@ class TLObject:
         return b''.join(r)
 
     @staticmethod
-    def serialize_datetime(dt):
+    def _serialize_datetime(dt):
         if not dt and not isinstance(dt, timedelta):
             return b'\0\0\0\0'
 
@@ -133,7 +133,7 @@ class TLObject:
             # provided) it will try to access `._bytes()`, which will fail
             # with `AttributeError`. This occurs in fact because the type
             # was wrong, so raise the correct error type.
-            raise TypeError('a TLObject was expected but found something else')
+            raise TypeError(f'a TLObject was expected but found {self!r}')
 
     # Custom objects will call `(...)._bytes()` and not `bytes(...)` so that
     # if the wrong type is used (e.g. `int`) we won't try allocating a huge
@@ -142,7 +142,7 @@ class TLObject:
         raise NotImplementedError
 
     @classmethod
-    def from_reader(cls, reader):
+    def _from_reader(cls, reader):
         raise NotImplementedError
 
 
@@ -151,8 +151,8 @@ class TLRequest(TLObject):
     Represents a content-related `TLObject` (a request that can be sent).
     """
     @staticmethod
-    def read_result(reader):
+    def _read_result(reader):
         return reader.tgread_object()
 
-    async def resolve(self, client, utils):
+    async def _resolve(self, client, utils):
         return self
diff --git a/telethon/_network/mtprotosender.py b/telethon/_network/mtprotosender.py
index 84f2b2c0..dd93f6ab 100644
--- a/telethon/_network/mtprotosender.py
+++ b/telethon/_network/mtprotosender.py
@@ -604,7 +604,7 @@ class MTProtoSender:
         else:
             try:
                 with BinaryReader(rpc_result.body) as reader:
-                    result = state.request.read_result(reader)
+                    result = state.request._read_result(reader)
             except Exception as e:
                 # e.g. TypeNotFoundError, should be propagated to caller
                 if not state.future.cancelled():
diff --git a/telethon/types/_core/gzippacked.py b/telethon/types/_core/gzippacked.py
index fd153196..ff805df4 100644
--- a/telethon/types/_core/gzippacked.py
+++ b/telethon/types/_core/gzippacked.py
@@ -26,7 +26,7 @@ class GzipPacked(tlobject.TLObject):
 
     def __bytes__(self):
         return struct.pack('<I', GzipPacked.CONSTRUCTOR_ID) + \
-               tlobject.TLObject.serialize_bytes(gzip.compress(self.data))
+               tlobject.TLObject._serialize_bytes(gzip.compress(self.data))
 
     @staticmethod
     def read(reader):
@@ -35,7 +35,7 @@ class GzipPacked(tlobject.TLObject):
         return gzip.decompress(reader.tgread_bytes())
 
     @classmethod
-    def from_reader(cls, reader):
+    def _from_reader(cls, reader):
         return GzipPacked(gzip.decompress(reader.tgread_bytes()))
 
     def to_dict(self):
diff --git a/telethon/types/_core/messagecontainer.py b/telethon/types/_core/messagecontainer.py
index 76442664..19e1883c 100644
--- a/telethon/types/_core/messagecontainer.py
+++ b/telethon/types/_core/messagecontainer.py
@@ -33,7 +33,7 @@ class MessageContainer(TLObject):
         }
 
     @classmethod
-    def from_reader(cls, reader):
+    def _from_reader(cls, reader):
         # This assumes that .read_* calls are done in the order they appear
         messages = []
         for _ in range(reader.read_int()):
diff --git a/telethon/types/_core/rpcresult.py b/telethon/types/_core/rpcresult.py
index d2b017d9..7fbdf5aa 100644
--- a/telethon/types/_core/rpcresult.py
+++ b/telethon/types/_core/rpcresult.py
@@ -12,13 +12,13 @@ class RpcResult(TLObject):
         self.error = error
 
     @classmethod
-    def from_reader(cls, reader):
+    def _from_reader(cls, reader):
         msg_id = reader.read_long()
         inner_code = reader.read_int(signed=False)
         if inner_code == _tl.RpcError.CONSTRUCTOR_ID:
-            return RpcResult(msg_id, None, _tl.RpcError.from_reader(reader))
+            return RpcResult(msg_id, None, _tl.RpcError._from_reader(reader))
         if inner_code == GzipPacked.CONSTRUCTOR_ID:
-            return RpcResult(msg_id, GzipPacked.from_reader(reader).data, None)
+            return RpcResult(msg_id, GzipPacked._from_reader(reader).data, None)
 
         reader.seek(-4)
         # This reader.read() will read more than necessary, but it's okay.
diff --git a/telethon_generator/generators/tlobject.py b/telethon_generator/generators/tlobject.py
index 3c0959c1..0893cca1 100644
--- a/telethon_generator/generators/tlobject.py
+++ b/telethon_generator/generators/tlobject.py
@@ -259,7 +259,7 @@ def _write_resolve(tlobject, builder):
             or ((arg.name, arg.type) in NAMED_AUTO_CASTS and tlobject.fullname not in NAMED_BLACKLIST))
         for arg in tlobject.real_args
     ):
-        builder.writeln('async def resolve(self, client, utils):')
+        builder.writeln('async def _resolve(self, client, utils):')
         builder.writeln('r = {}')  # hold replacements
 
         for arg in tlobject.real_args:
@@ -352,7 +352,7 @@ def _write_to_bytes(tlobject, builder):
 
 def _write_from_reader(tlobject, builder):
     builder.writeln('@classmethod')
-    builder.writeln('def from_reader(cls, reader):')
+    builder.writeln('def _from_reader(cls, reader):')
     for arg in tlobject.args:
         _write_arg_read_code(builder, arg, tlobject, name='_' + arg.name)
 
@@ -382,7 +382,7 @@ def _write_read_result(tlobject, builder):
 
     builder.end_block()
     builder.writeln('@staticmethod')
-    builder.writeln('def read_result(reader):')
+    builder.writeln('def _read_result(reader):')
     builder.writeln('reader.read_int()  # Vector ID')
     builder.writeln('return [reader.read_{}() '
                     'for _ in range(reader.read_int())]', m.group(1))
@@ -487,7 +487,7 @@ def _write_arg_to_bytes(builder, arg, tlobject, name=None):
         builder.write("struct.pack('<d', {})", name)
 
     elif 'string' == arg.type:
-        builder.write('self.serialize_bytes({})', name)
+        builder.write('self._serialize_bytes({})', name)
 
     elif 'Bool' == arg.type:
         # 0x997275b5 if boolean else 0xbc799737
@@ -497,10 +497,10 @@ def _write_arg_to_bytes(builder, arg, tlobject, name=None):
         pass  # These are actually NOT written! Only used for flags
 
     elif 'bytes' == arg.type:
-        builder.write('self.serialize_bytes({})', name)
+        builder.write('self._serialize_bytes({})', name)
 
     elif 'date' == arg.type:  # Custom format
-        builder.write('self.serialize_datetime({})', name)
+        builder.write('self._serialize_datetime({})', name)
 
     else:
         # Else it may be a custom type
@@ -628,7 +628,7 @@ def _write_arg_read_code(builder, arg, tlobject, name):
             # and we don't have information about such thing in the
             # method we just ignore that case.
             builder.writeln('from {} import {}', ns, class_name)
-            builder.writeln('{} = {}.from_reader(reader)',
+            builder.writeln('{} = {}._from_reader(reader)',
                             name, class_name)
 
     # End vector and flag blocks if required (if we opened them before)