Display
Equipped with a CSTN display, the N21i brought color visuals to users, albeit limited by today’s standards. The screen supports 256 colors and has a resolution of 120 x 160 pixels, accommodating up to 10 lines of text, which was practical for basic navigation and reading messages. A unique feature of the phone was its 7-color LED, which allowed users to assign different colors to contact groups, adding a personalized touch to incoming calls.