When he can't get it to read the micro SD card, does that mean the N8 cannot detect the card? or the N8 detected the card but couldn't read any content? or the N8 detected the card, can see the folders, but cannot access the files in the folder?
Can you ask the new owner to scan the card AFTER reformatting. Make sure the card does not have any bad sector. And if he can, record a short video clip to illustrate what exactly happened from the time he inserted the card into N8. We have run into several cases where we can't find any explanation, but then we find out that the uses has inserted the card the wrong way up. and as I said explained above, can't get it to read micro SD card can means different things to different person.
Alternatively, you can send the video to
service@cayin.cn, our service engineers will examine the video and provide more feedback.