diff --git a/mtkclient/Library/DA/legacy/dalegacy_lib.py b/mtkclient/Library/DA/legacy/dalegacy_lib.py
index 8e2a9a2..fbbb128 100755
--- a/mtkclient/Library/DA/legacy/dalegacy_lib.py
+++ b/mtkclient/Library/DA/legacy/dalegacy_lib.py
@@ -521,6 +521,8 @@ class DALegacy(metaclass=LogBase):
         self.emmc = EmmcInfo(self.config, self.usbread(0x5C))
         self.sdc = SdcInfo(self.config, self.usbread(0x1C))
         self.flashconfig = ConfigInfo(self.usbread(0x26))
+        if self.config.hwcode == 0x8163:
+            status=self.usbread(4)
         pi = PassInfo(self.usbread(0xA))
         if pi.ack == 0x5A:
             return True
diff --git a/mtkclient/Library/DA/legacy/extension/legacy.py b/mtkclient/Library/DA/legacy/extension/legacy.py
index d378073..254ecb4 100755
--- a/mtkclient/Library/DA/legacy/extension/legacy.py
+++ b/mtkclient/Library/DA/legacy/extension/legacy.py
@@ -351,7 +351,7 @@ class LegacyExt(metaclass=LogBase):
             else:
                 self.info("SEJ Mode: No meid found. Are you in brom mode ?")
         if self.config.chipconfig.gcpu_base is not None:
-            if self.config.hwcode in [0x335, 0x8167, 0x8163, 0x8176]:
+            if self.config.hwcode in [0x335, 0x8167, 0x8168, 0x8163, 0x8176]:
                 self.info("Generating gcpu mtee2 key...")
                 mtee2 = hwc.aes_hwcrypt(btype="gcpu", mode="mtee")
                 if mtee2 is not None:
diff --git a/mtkclient/Library/DA/xflash/xflash_lib.py b/mtkclient/Library/DA/xflash/xflash_lib.py
index b7a28b8..dccd2f8 100755
--- a/mtkclient/Library/DA/xflash/xflash_lib.py
+++ b/mtkclient/Library/DA/xflash/xflash_lib.py
@@ -8,7 +8,7 @@ import sys
 from binascii import hexlify
 from struct import pack, unpack
 
-from Cryptodome.Util.number import long_to_bytes
+from Cryptodome.Util.number import bytes_to_long, long_to_bytes
 
 from mtkclient.Library.Auth.sla import generate_da_sla_signature
 from mtkclient.Library.DA.xflash.xflash_flash_param import NandExtension
diff --git a/mtkclient/Library/DA/xml/extension/v6.py b/mtkclient/Library/DA/xml/extension/v6.py
index eb467fa..1424542 100755
--- a/mtkclient/Library/DA/xml/extension/v6.py
+++ b/mtkclient/Library/DA/xml/extension/v6.py
@@ -905,7 +905,7 @@ class XmlFlashExt(metaclass=LogBase):
             else:
                 self.info("SEJ Mode: No meid found. Are you in brom mode ?")
         if self.config.chipconfig.gcpu_base is not None:
-            if self.config.hwcode in [0x335, 0x8167, 0x8163, 0x8176]:
+            if self.config.hwcode in [0x335, 0x8167, 0x8168, 0x8163, 0x8176]:
                 self.info("Generating gcpu mtee2 key...")
                 mtee2 = hwc.aes_hwcrypt(btype="gcpu", mode="mtee")
                 if mtee2 is not None:
diff --git a/mtkclient/Library/DA/xml/xml_lib.py b/mtkclient/Library/DA/xml/xml_lib.py
index ad399aa..933e5c6 100755
--- a/mtkclient/Library/DA/xml/xml_lib.py
+++ b/mtkclient/Library/DA/xml/xml_lib.py
@@ -798,7 +798,9 @@ class DAXML(metaclass=LogBase):
         return None
 
     def change_usb_speed(self):
-        return self.send_command(self.Cmd.cmd_can_higher_usb_speed())
+        resp = self.send_command(self.Cmd.cmd_can_higher_usb_speed())
+        if "Unsupported" in resp:
+            return False
 
     def read_partition_table(self) -> tuple:
         self.send_command(self.Cmd.cmd_read_partition_table(), noack=True)
diff --git a/mtkclient/Library/Hardware/hwcrypto.py b/mtkclient/Library/Hardware/hwcrypto.py
index 241d47f..ebc9b6c 100755
--- a/mtkclient/Library/Hardware/hwcrypto.py
+++ b/mtkclient/Library/Hardware/hwcrypto.py
@@ -91,7 +91,7 @@ class HwCrypto(metaclass=LogBase):
             elif mode == "mtee":
                 if self.hwcode in [0x321]:
                     return self.gcpu.mtk_gcpu_mtee_6735()
-                elif self.hwcode in [0x8167, 0x8163, 0x8176]:
+                elif self.hwcode in [0x8168, 0x8167, 0x8163, 0x8176]:
                     return self.gcpu.mtk_gcpu_mtee_8167()
         elif btype == "dxcc":
             if mode == "fde":
diff --git a/mtkclient/Library/Hardware/hwcrypto_gcpu.py b/mtkclient/Library/Hardware/hwcrypto_gcpu.py
index 39515da..1d9b99c 100755
--- a/mtkclient/Library/Hardware/hwcrypto_gcpu.py
+++ b/mtkclient/Library/Hardware/hwcrypto_gcpu.py
@@ -266,7 +266,7 @@ class GCpu(metaclass=LogBase):
             self.reg.GCPU_REG_MSC = 0x80FF1800
             self.reg.GCPU_AXI = 0x887F
             self.reg.GCPU_UNK2 = 0
-        elif self.hwcode == [0x8163, 0x8176]:
+        elif self.hwcode == [0x8163, 0x8176, 0x8168]:
             self.write32(CLR_CLK_GATING_CTRL2, self.read32(CLR_CLK_GATING_CTRL2) | 0x8000000)
             self.reg.GCPU_REG_CTL &= 0xFFFFFFF0
             self.reg.GCPU_REG_CTL |= 0xF