How to check Nano S is fake or not? I just bough a Nano S lastweek but my friend told me its fake
There are 2 things to consider:
1) Legitimacy of the firmware:
Will be checked automatically when you start up ledger live. If you don't get any error message stating that the firmware is non-genuine, you are fine.
2) Legitimacy of the hardware:
You can open the case and check the hardware. There is a
guide available from ledger.
Where did you get your nano s from ?
And why exactly does your friend claim it is fake ?