Need help -- keyboard issues

[Guest tom25]

As of yesterday my SGH-i617 (Brazilian version - Carrier: Vivo) is non responsive when I press the following keys: "0", "space bar", the button next to the whell ("Contacts"), which are essential.

The strangest thing: if I go to the hard reset screen and it asks me to press any number from the keypad except "1" to exit, and I press "0", it is recognized.

I've already tried the "formatting" option for several times but it doesn't work. So, I believe the problem to be within WM 6.1! Does this make any sense?

Thanks.