Nokia 3100 / 3120

Hi,

I recently got a new 3120 phone from Cingular and notice that the main screen flickers slightly (there is a left-to-right vertical 'wave'). It is not visible in a quick glance but if you look for it, you can see it.

I am wondering if this a common problem with 3120s or an issue limited to my handset.

Thanks,
rookie