Samsung Galaxy A21s is an upgraded version of its predecessor, the Galaxy A21, bringing enhancements in several key areas to deliver a more powerful and versatile user experience. The most noticeable change is the upgrade in the camera system. The Galaxy A21s features a quad-camera setup with a 48MP primary sensor, compared to the A21's 16MP camera. This enhancement provides improved low-light performance and greater detail in images. Additionally, the inclusion of an 8MP ultra-wide lens, a 2MP macro lens, and a 2MP depth sensor greatly expands creative photography options, allowing users to capture a wider range of subjects and scenes.Performance-wise, the Galaxy A21s is powered by the Exynos 850 processor, which offers better efficiency and speed compared to the MediaTek Helio P35 in the A21. This translates to smoother multitasking and improved gaming performance, particularly for users who engage in demanding applications.In terms of display, both models share a similar 6.5-inch Infinity-O display; however, the A21s benefits from software optimizations that enhance visual clarity and color accuracy, creating a more immersive viewing experience. The screen resolution remains HD+ (720 x 1600 pixels), with a vibrant design that makes content consumption enjoyable.Battery life also sees an improvement with the Galaxy A21s, equipped with a robust 5000mAh battery that ensures prolonged usage without frequent recharging. The A21 offered a slightly smaller battery capacity, making the A21s a better choice for heavy users or those on the go.On the software front, the Galaxy A21s comes pre-installed with Samsung's One UI 2.0 based on Android 10, which includes several enhancements in usability, customization options, and overall aesthetic appeal. This update offers a more streamlined interface that is user-friendly and provides greater access to tools and features.Storage options have been expanded in the A21s, providing configurations starting at 32GB, with the availability of 64GB and 128GB variants, all while supporting microSD expansion for added flexibility. This allows users to store more apps, media, and files without running into space limitations, an aspect that was more restricted in the prior model.Overall, the Samsung Galaxy A21s significantly improves upon the A21 with a more powerful camera system, better processor, longer battery life, and enhanced software experience, making it an appealing option for budget-conscious consumers seeking a reliable smartphone.