To find a Samsung Galaxy S21 5G in stores, your best options are major electronics retailers, copyright stores (like Verizon, AT&T, T-Mobile), and official Samsung Experience stores. However, as it is a previous-generation model, availability in physical stores may be limited. You will likely have better luck checking online inventories or considering refurbished units. https://caygadgets.com/product/samsung-galaxy-s21-5g/