Hello, I have nokia lumia 820 phone running on windows 8 operating system. And this is windows first phone to offer SD card slot to add more storage apart from phone memory. So I have inserted a new Kingston 4Gb micro SD card with no data in it, but my phone not recognizes the SD card, and it doesn't vibrate or doesn't make any sound while inserting or removing the card. I have tried with different SD cards with different storage spaces, but no result. So tell me what should I do now? Please help me to use the given option. Thank you.