Help Keypad's freezing

[shalin99]

I have a samsung galaxy sl i9003
got it a month back

india got the gingerbread update just a couple of weeks back,
i updated my phone, it worked well for a few days
but now
my keypad freezes when i'm typing, its very slow now.
i use the default samsung keypad.

i even tried factory resetting the phone, but that didn't work either.
even though i have no apps installed, its slow. YEA, NO EXTERNAL APPS INSTALLED.
Please help.
Thanks.