diff --git a/mtproto.php b/mtproto.php
index ddfa1198..a1385074 100755
--- a/mtproto.php
+++ b/mtproto.php
@@ -187,6 +187,7 @@ class Session
         }
         $x = $this->struct->unpack('<I', substr($packet, 0, 4));
         $auth_key_id = substr($packet, 4, 8);
+        hex_dump($packet);
         if ($auth_key_id == string2bin('\x00\x00\x00\x00\x00\x00\x00\x00')) {
             list($message_id, $message_length) = $this->struct->unpack('<8sI', substr($packet, 12, 12));
             $data = substr($packet, 24, (24 + $message_length) - 24);
@@ -210,6 +211,7 @@ class Session
 
     public function method_call($method, $kwargs)
     {
+        //var_dump($kwargs);
         foreach (range(1, $this->MAX_RETRY) as $i) {
             try {
                 $this->send_message($this->tl->serialize_method($method, $kwargs));
@@ -230,6 +232,7 @@ class Session
         $ResPQ = $this->method_call('req_pq', ['nonce' => $nonce]);
         $server_nonce = $ResPQ['server_nonce'];
         $public_key_fingerprint = $ResPQ['server_public_key_fingerprints'][0];
+        var_dump($public_key_fingerprint);
         $pq_bytes = $ResPQ['pq'];
 
         $pq = new \phpseclib\Math\BigInteger($pq_bytes, 256);
@@ -273,7 +276,7 @@ class Session
         pyjslib_printnl(sprintf('Server-client time delta = %.1f s', $this->timedelta));
         $dh_prime = $this->struct->unpack('>Q', $dh_prime_str);
         $g_a = $this->struct->unpack('>Q', $g_a_str);
-        assert($this->PrimeModule->isPrime($dh_prime));
+        assert($this->PrimeModule->isprime($dh_prime));
         $retry_id = 0;
         $b_str = \phpseclib\Crypt\Random::string(256);
         $b = $this->struct->unpack('>Q', $b_str);
diff --git a/mtproto.py b/mtproto.py
index 00043b83..fe97fd28 100644
--- a/mtproto.py
+++ b/mtproto.py
@@ -6,6 +6,7 @@ Created on Tue Sep  2 19:26:15 2014
 @author: Sammy Pfeiffer
 """
 from binascii import crc32 as originalcrc32
+from binascii import hexlify
 from time import time
 import io
 import os.path
@@ -125,6 +126,7 @@ class Session:
         return data
 
     def method_call(self, method, **kwargs):
+        #print(kwargs)
         for i in range(1, self.MAX_RETRY):
             try:
                 self.send_message(TL.serialize_method(method, **kwargs))
@@ -169,7 +171,6 @@ class Session:
         random_bytes = os.urandom(255-len(data)-len(sha_digest))
         to_encrypt = sha_digest + data + random_bytes
         encrypted_data = key.encrypt(to_encrypt, 0)[0]
-
         print("Starting Diffie Hellman key exchange")
         server_dh_params = self.method_call('req_DH_params',
                                             nonce=nonce,