Introduction The is a fun little affordable feature phone coming in vibrant colorful tones. With a unique glass-like outer coating, it appears as if it’s in a transparent glossy case and is definitely aiming for the younger crowds. The Asha 503 comes in a dual and single SIM models (we have the single SIM version for review). It builds up on the blocky design and colors of the , but adds in 3G connectivity, a more capable 5-megapixel camera and a bit more in performance power.