diff --git a/mtkclient/Library/legacy_ext.py b/mtkclient/Library/legacy_ext.py
index 906df97..45be7a9 100644
--- a/mtkclient/Library/legacy_ext.py
+++ b/mtkclient/Library/legacy_ext.py
@@ -181,9 +181,11 @@ class legacyext(metaclass=LogBase):
         if seccfg_data[:0xC] == b"AND_SECCFG_v":
             self.info("Detected V3 Lockstate")
             sc_org = seccfgV3(hwc, self.mtk)
-        else:
+        elif seccfg_data[:4] == b"\x4D\x4D\x4D\x4D":
             self.info("Detected V4 Lockstate")
             sc_org = seccfgV4(hwc, self.mtk)
+        else:
+            return False, "Unknown lockstate or no lockstate"
         if not sc_org.parse(seccfg_data):
             return False, "Device has is either already unlocked or algo is unknown. Aborting."
         writedata = sc_org.create(lockflag=lockflag)
diff --git a/mtkclient/Library/mtk_dalegacy.py b/mtkclient/Library/mtk_dalegacy.py
index 8a72564..8a24bb0 100755
--- a/mtkclient/Library/mtk_dalegacy.py
+++ b/mtkclient/Library/mtk_dalegacy.py
@@ -1785,7 +1785,8 @@ class DALegacy(metaclass=LogBase):
         else:
             buffer = bytearray()
             bytestoread = length
-            self.mtk.daloader.progress.show_progress("Read", 0, length, display)
+            if display:
+                self.mtk.daloader.progress.show_progress("Read", 0, length, display)
             while bytestoread > 0:
                 size = bytestoread
                 if bytestoread > packetsize:
@@ -1799,6 +1800,8 @@ class DALegacy(metaclass=LogBase):
                     rpos = length - bytestoread
                 else:
                     rpos = 0
-                self.mtk.daloader.progress.show_progress("Read", rpos, length, display)
-            self.mtk.daloader.progress.show_progress("Read", length, length, display)
+                if display:
+                    self.mtk.daloader.progress.show_progress("Read", rpos, length, display)
+            if display:
+                self.mtk.daloader.progress.show_progress("Read", length, length, display)
             return buffer
diff --git a/mtkclient/Library/xflash_ext.py b/mtkclient/Library/xflash_ext.py
index aa17983..4e2cdfe 100644
--- a/mtkclient/Library/xflash_ext.py
+++ b/mtkclient/Library/xflash_ext.py
@@ -524,9 +524,11 @@ class xflashext(metaclass=LogBase):
         if seccfg_data[:0xC] == b"AND_SECCFG_v":
             self.info("Detected V3 Lockstate")
             sc_org = seccfgV3(hwc, self.mtk)
-        else:
+        elif seccfg_data[:4] == b"\x4D\x4D\x4D\x4D":
             self.info("Detected V4 Lockstate")
             sc_org = seccfgV4(hwc, self.mtk)
+        else:
+            return False, "Unknown lockstate or no lockstate"
         if not sc_org.parse(seccfg_data):
             return False, "Device has is either already unlocked or algo is unknown. Aborting."
         writedata = sc_org.create(lockflag=lockflag)