SD card not detecting

[Hasb]

I am using Xperia M. I was using it with an SD card in it. Suddenly on  a day the fone donot detect the card anymore. I tried with another card, still the same. Both these cards are detected by my PC

[_alexdon_]

Restart your device and try again.

[samkkr]

try doin a rest of the phone if still not works try another sdcard if that does not help take it to sony centre