Share your experience!
Tried two sd cards, neither of them are recognised by the phone. What should I do?
Yes, I have. I've also tried putting the card in when the phone is off instead of on. Nothing seems to work.
I used one of the sd card in a Motorola phone previously. Once inserted I could format it to that phone and then put it into the Xperia which didn't do anything.
Strange. Did you insert it correctly in the Xperia? Any chance you could have the phone checked?