Memory Card not visible in mobile phone

I know this is not the right place to ask this question, but I couldn’t find a solution anywhere else. Then I thought maybe someone here can help.
The problem is, I have a new Nokia mobile phone, but I cannot see the mocro SD card anywhere in it. It should be seen in Gallery, but the Gallery in my phone doesn’t show it. Can anyone please help me? If that is not possible, I will appreciate it if you could direct me to another page where I can find help. Thanks.

sometimes one brand of SD card will not read on a some device try another brand of card.

Will try it. Thanks.