Back to the off topic SIM card size issues 
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I think that it greatly depends on how the actual socket receptacle is made, in theory the nano is thinner than the micro (by a teeny tiny amount, 0.67 instead of 0.76 mm) to allow the adapter to have a “back sheet” (that can often be replaced by some sticky tape) but the actual fit in the device may be too tight or sometimes you need to add the tape even to a normal micro because it is too loose.
Lenovo take on the matter, they must have had issues too:
https://support.lenovo.com/ch/en/solutions/ht504164-sim-card-detection-issue-with-nano-to-micro-adapter-or-a-multi-fit-sim-card-thinkpad