The Samsung Galaxy J7 Duo introduces several enhancements and changes over its predecessor, the Galaxy J7 (2017). One of the most significant upgrades is the dual-camera system on the rear, featuring a 13MP primary sensor and a 5MP secondary sensor. This configuration allows for improved photography capabilities, including the ability to create depth-of-field effects and better low-light performance. In contrast, the earlier model only offered a single 13MP rear camera. In terms of design, the J7 Duo offers a more refined and modern aesthetic with a metal unibody construction that not only enhances durability but also elevates the overall premium look and feel. The front features a larger display with a 5.5-inch Super AMOLED screen, providing vibrant colors and improved contrast ratios compared to the previous model’s TFT display.The performance of the J7 Duo has been upgraded with a more powerful Exynos 7885 processor, coupled with 4GB of RAM. This combination leads to smoother multitasking and more responsive performance when running demanding applications or gaming, addressing any performance limitations found in the earlier version.Battery life sees an improvement with a larger 3000mAh capacity battery, which allows for extended usage without the need for frequent recharging. This is particularly beneficial for users who rely on their devices throughout the day.Software enhancements are also notable, with the J7 Duo shipping with Android Oreo out of the box, providing a more up-to-date user experience, better power management, and additional features compared to the prior model, which was limited to older software.Finally, the J7 Duo incorporates advanced biometric security features, including a rear-mounted fingerprint sensor, which improves convenience and security over the previous generation that lacked this functionality.Overall, the Samsung Galaxy J7 Duo represents a significant upgrade in design, camera capabilities, performance, battery life, and software features compared to its predecessor, making it a compelling choice for those seeking a mid-range smartphone.