My phone came with a 2GB sd card. It stopped reading it and said "damaged sd card" but I can use it on other phones and it works well. I bought 2 new sd cards but it won't read them either. It reads them everytime after I format them, but once I switch the phone off I have to format the sd card again when I switch it on or it won't read it. And I can't format using the phone since it doesn't recognize that it has an sd card in it, I have to use my laptop to format. What could the problem be and how can I resolve it? Thanks in advance.