The Symbian Belle powered Nokia 603 promo images have leaked. The six Belle home screen running Nokia 603 is powered by 1GHz ARM11 CPU, 360×460 resolution supporting display, 5-megapixel camera, Wi-Fi b/g/n, Bluetooth and also features NFC. However, the phone supports microSIM.
Seeing from the image of the phone, we speculate that the screen size would be around 3.5inch. This phone probably will be announced at the Nokia World 2011.