Hi,
The unique ID number must be the complete 128-bit number, we can't assume that the LSB or MSB part is going to be unique. The unique ID is programmed during manufacturing and the algorithm can't be shared it. Therefore the unique number must be 128-bit not only the MSB part (SIM_UIDH and SIM_UIDL) or LSB part (SIM_UIDMH and SIM_UIDML).
I'm sorry for the inconvenience.
Have a great day,
Ping
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