are frequently caused by poor data transfer. Use a high-quality original USB cable and try a USB 2.0 port instead of USB 3.0. Reflash Stock Firmware

: In some network proxy scenarios (like Minecraft servers), 0x68 corresponds to a specific packet type related to slot data . If this packet arrives out of sequence or is malformed during the initial login handshake, the system will report it as unexpected. Troubleshooting Steps

If you are working with IoT modules like the SIM800, SIM7000, or SIM7600 series, you may have encountered the following cryptic message in your serial debug log:

: If the handshake succeeds but the tool later reports "failed to mount data" or "unable to mount storage," it indicates an encrypted or corrupted data partition.