The other day, this A2 froze for about 1min then rebooted itself and ever since then it wont read my 8gig sd card. I plug the card itself into my computer and it shows all the files n folders but if I try opening any of em it hangs and never does anything. BACK TO MY ORIGINAL POINT, ever since, when I get a text msg my phone only vibrates without tone no matter what settings I try. Any help please?