Conclusion
The NIU Tek 4D2 is a straightforward and affordable choice for users who need a basic smartphone that handles essential functions without unnecessary complexity. Its dual SIM capability, basic multimedia features, and reasonable battery life make it a pragmatic choice for users who prioritize simplicity over advanced functionality. However, users seeking more robust applications, exceptional photography, or richer display experiences may find its capabilities limiting. As of now, this model has been discontinued, reflecting the rapid advancement of smartphone technology since its release.