problem with ON Screen Display

I purchase two mobiles from “The mobile store” sanman complex vastrapur, ahmedabad. The first one was 6303i about 3 weeks back and the second one 6700 slide yesterday only. I preferred mobile store just because of originality issue. However, today morning I experienced a very strange problem with 6303i. The home page “ON SCREEN” display has some sort of thin digital noisy strip at the base. It persisted in subsequent applications also, even after changing the theme. Because of that I am unable to visualize the options displayed at the very bottom of screen. The sales person Mr. Deepak emphasized that in case of any software or hardware related issue our engineer can come to your doorstep to solve the same. Also I never expected so frequent problem with nokia handset as I am using nokia since last 8 years. Please help me to get rid of this issue

Thanks

Regards

Dr. Satinder Singh
Deputy Manager- Vaccine Research
DST C&MB R&D II 3rd Floor
Cadila Pharmaceuticals Limited
Ahmedabad
+919879665099