Thanks all for your input,

I’ve found what works very well fsarchiver ! that can make live (or not) system backup awesome piece of software.

Thank you @[email protected] !
This is the solution.

unfortunately I can’t apply it, because the NAS is a closed proprietary 💩

FYI great information about dual sim hardware type --> https://en.wikipedia.org/wiki/Dual_SIM#Types

Worked, perfectly 👍

Thank you @[email protected] ! hooo so I can hide any post not only mine ! ok then it make more sense :D