The Samsung Galaxy is yet another smartphone to join the Galaxy M series. It brings some of the key features that the Galaxy M series is known for. The smartphone packs in a 6.4-inch AMOLED display that isn t very common at this price point. It has a vivid output and very good viewing angles. Samsung has made the Galaxy M21 out of plastic to keep the price of the smartphone in the affordable segment. The highlight of the Galaxy M21 is the massive 6,000mAh battery that helps it deliver great battery life. One downside is that the charging time is longer which could get annoying.