Well i have been checking a bunch of pages but i cant still find the solution. So when i friend called me i presses de green button but then mi nokia got frozen. So i couldt turn off usng the power button so i removed the battery. But now i cant know when someone send me a message. It doesnt make any sound and the "message received" text doesnt appear =/ I read that i can fix it upgrading the firmware but theres no updated for this model. Any answers? Thanks.