Problem is that i didnt even eject the sim/nm card adaptor nor was i even using the phone. Any idea why is this happening? Been using the NM Card for 2 weeks now.
I had the same issue with my Mate 20 pro. I looks like NM card reader loose contacts. I used very thin double sided tape to stick my NM card to the tray. This will lift the card slightly and of course will create a tighter fit in the slot (the idea is to make NM card contacts press harder against card reader pins inside the phone) . So far so good. Message was appearing couple times a day, but now whole 24 hours and nothing. Tape must be very thin otherwise NM card pins inside the phone can be damaged while sliding the tray back in. I'll keep on monitoring. Hopefully it will solve the problem.
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