While trying to re-write data on tag if you encounter the following message:
"Memory locked. The Tag memory location is locked or permalocked and is either not writeable or not readable"
This message will appear if you attempt to write to a write-protected memory.
In RFID Read/Write Tag option, follow the next steps:
User Memory Read/Write
Click "Auto SCAN(1 sec)"
Select Memory Bank, input Length and Offset
Click "READ"
Check results
User Memory Read/Write
Select Memory Bank as "User"
Input Length=1 and Offset=0
Click "READ"
Input "1234"
Click "Write"
Check results: Writing Tag completed successfully