While not an iPhone, the Samsung Galaxy S21 is a popular choice for those seeking a compact smartphone. It features a 6.2-inch Dynamic AMOLED display, Exynos 2100 or Snapdragon 888 chipset (depending on the region), and a versatile triple-camera system. The Galaxy S21 supports 5G connectivity, has an in-display fingerprint sensor, and offers a range of features such as wireless charging and water resistance. With its sleek design and powerful performance, the Galaxy S21 is a top seller in the compact smartphone category.