when i press "i" for example, it displays "ighel" like that.

Hi,

I have a very strange situation these days,

whenever i press "i" for example, it displays "ighel" like that on the screen.
and this happens on a few keys like shift, i, k, facebook buttons etc.

first, this happens in the morning, and after 10 minutes of usage, it gets fine.
i guess it gets fine after warming up the phone, so it is related with device temperature??

second, the multiple character displays on the screen is always the same.
pressing "i" for "ighel" like that.(just a sample, not exact texts which i've seen on the screen though)
pressing "k" for "werh" like that.(just a sample, not exact texts which i've seen on the screen though)

anyone can help me?
i'll appreciate your help.

thanks.