xperia arc s error.

[oriana123]

Hi so I´ve got an Xperia Arc S and i´m having a lot of trouble, it doesn´t work well i don´t know why. The problem is that the sim card is not recognized by the phone. I mean, it recognizes it but suddenly there´s a warning in the screen that says: your sim card is not recognized, please restart your phone. Then I press ok (which means restarting the phone) and most of the times when it turns on again the sim card is still not recognized. This is happening to me lots of times everyday. I´ve tried changing the sim card but the same happens. And the technical says the phone has no guarantee so it will probably cost a lot of money that I don´t have.

Do you know what could be happening? any cheap idea to fix it?

Thanks!!