Conclusion
Overall, the NIU Niutek 4.5D delivered reasonable value for its intended entry-level market. While it lagged in performance and camera quality compared to modern smartphones, it served essential communication and multimedia functions adequately for the time. Its dual-SIM capability and decent battery life were standout features for users in regions with varying network coverage or who sought to separate personal and work communications without carrying multiple devices. Although discontinued, the Niutek 4.5D exemplifies a practical approach to budget smartphone design and utility in its era.