Compare Galaxy A21s with 4011 devices. You can see which you should buy through this compiled table

Color:ー ー/ / ー ー, Dimensions (width x height x thickness):2.7 inches (69 mm) x 5.6 inches (142 mm) x 0.3 inches (7.6 mm), Weight:143 oz (143 g), Display type:IPS, Screen resolution (width x height):1080 x 1920, Pixel density:440 ppi, Display size:5 inch, OS:Android

Color:Champagne/silver/gray/black, Dimensions (width x height x thickness):2.9 inches (72.5 mm) x 5.7 inches (144.5 mm) x 0.4 inches (8.9 mm), Weight:158.5 oz (158.5 g), Display type:IPS LCD, Screen resolution (width x height):720 x 1280, Pixel density:293 ppi, Display size:5 inch, OS:Android

Color:Black/White, Dimensions (width x height x thickness):3.1 inches (78.4 mm) x 6.0 inches (151.9 mm) x 0.3 inches (8.1 mm), Weight:165 oz (165 g), Display type:AMOLED, Screen resolution (width x height):1440 x 2560, Pixel density:515 ppi, Display size:5.7 inch, OS:Windows

Color:Black/Gold/Rose Gold, Dimensions (width x height x thickness):2.9 inches (72.9 mm) x 5.9 inches (149.1 mm) x 0.3 inches (7.7 mm), Weight:147 oz (147 g), Display type:IPS LCD, Screen resolution (width x height):720 x 1280, Pixel density:282 ppi, Display size:5.2 inch, OS:Android

Color:Golden, Dimensions (width x height x thickness):3.0 inches (75.4 mm) x 6.0 inches (151.8 mm) x 0.3 inches (7 mm), Weight:155 oz (155 g), Display type:AMOLED, Screen resolution (width x height):1080 x 1920, Pixel density:400 ppi, Display size:5.5 inch, OS:Android

Color:Liquid Black/Liquid Silver/Deep Green/Ash Pink, Dimensions (width x height x thickness):2.8 inches (72 mm) x 6.0 inches (153 mm) x 0.4 inches (11.1 mm), Weight:198 oz (198 g), Display type:IPS LCD, Screen resolution (width x height):1080 x 2160, Pixel density:423 ppi, Display size:5.7 inch, OS:Android

Color:Silver/Gold/Rose Gold, Dimensions (width x height x thickness):3 inches (76.2 mm) x 6.0 inches (153.5 mm) x 0.3 inches (7.6 mm), Weight:167.8 oz (167.8 g), Display type:Super AMOLED, Screen resolution (width x height):1440 x 2560, Pixel density:540 ppi, Display size:5.43 inch, OS:Android

Color:Black, Dimensions (width x height x thickness):3.1 inches (78 mm) x 6.4 inches (163 mm) x 0.5 inches (13 mm), Weight:250 oz (250 g), Display type:IPS LCD, Screen resolution (width x height):1080 x 1920, Pixel density:423 ppi, Display size:5.2 inch, OS:Android

Color:Sapphire Blue/Black/Platinum gold, Dimensions (width x height x thickness):3.0 inches (75.3 mm) x 6.2 inches (158.3 mm) x 0.3 inches (7.6 mm), Weight:172 oz (172 g), Display type:LTPS IPS LCD, Screen resolution (width x height):1080 x 2340, Pixel density:409 ppi, Display size:6.3 inch, OS:Android

Color:Gloss midnight blue/gloss steel, Dimensions (width x height x thickness):2.8 inches (71.2 mm) x 5.9 inches (149.7 mm) x 0.3 inches (8 mm), Weight:160 oz (160 g), Display type:IPS LCD, Screen resolution (width x height):1080 x 2280, Pixel density:431 ppi, Display size:5.84 inch, OS:Android

Color:Metallic Copper/Lavender Purple/Ocean Blue/Midnight Black/Pure White/Alpine White, Dimensions (width x height x thickness):3.0 inches (76.4 mm) x 6.4 inches (161.9 mm) x 0.3 inches (8.8 mm), Weight:201 oz (201 g), Display type:Super AMOLED, Screen resolution (width x height):1440 x 2960, Pixel density:514 ppi, Display size:6.4 inch, OS:Android

Color:Bronze Gold Black, Dimensions (width x height x thickness):3.2 inches (82.4 mm) x 6.6 inches (166.4 mm) x 0.3 inches (8 mm), Weight:197 oz (197 g), Display type:IPS LCD, Screen resolution (width x height):1080 x 1920, Pixel density:368 ppi, Display size:5.98 inch, OS:Android

Color:Speed Orange, Dimensions (width x height x thickness):2.9 inches (74.8 mm) x 6.2 inches (157.5 mm) x 0.3 inches (8.2 mm), Weight:185 oz (185 g), Display type:Optic AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:402 ppi, Display size:6.41 inch, OS:Android

Color:Aurora Black/Moroccan Blue/Platinum Gray, Dimensions (width x height x thickness):3.0 inches (77 mm) x 6.4 inches (161.3 mm) x 0.3 inches (8.7 mm), Weight:170 oz (170 g), Display type:IPS LCD, Screen resolution (width x height):720 x 1520, Pixel density:268 ppi, Display size:6.26 inch, OS:Android

Color:Midnight Black/Sky Blue/Sapphire Blue/White/Red, Dimensions (width x height x thickness):2.9 inches (73.6 mm) x 6.1 inches (154.8 mm) x 0.3 inches (8 mm), Weight:162 oz (162 g), Display type:IPS LCD, Screen resolution (width x height):1080 x 2340, Pixel density:415 ppi, Display size:6.21 inch, OS:Android

Color:Aqua Blue/Burgundy Red, Dimensions (width x height x thickness):3.0 inches (76.8 mm) x 6.3 inches (159.4 mm) x 0.4 inches (8.9 mm), Weight:190.5 oz (190.5 g), Display type:IPS LCD, Screen resolution (width x height):720 x 1544, Pixel density:268 ppi, Display size:6.35 inch, OS:Android

Color:Emerald Green/Midnight Black/Sapphire Blue, Dimensions (width x height x thickness):3.0 inches (77.3 mm) x 6.4 inches (163.5 mm) x 0.4 inches (8.9 mm), Weight:196.8 oz (196.8 g), Display type:LTPS IPS LCD, Screen resolution (width x height):1080 x 2340, Pixel density:391 ppi, Display size:6.59 inch, OS:Android

Color:Blue/Red, Dimensions (width x height x thickness):2.8 inches (70.9 mm) x 5.7 inches (145.8 mm) x 0.3 inches (8.5 mm), Weight:138 oz (138 g), Display type:IPS LCD, Screen resolution (width x height):720 x 1520, Pixel density:295 ppi, Display size:5.7 inch, OS:Android

Color:Peacock blue/Peach powder/Ink blue, Dimensions (width x height x thickness):3.0 inches (76.7 mm) x 6.3 inches (159.4 mm) x 0.4 inches (8.9 mm), Weight:190.5 oz (190.5 g), Display type:IPS LCD, Screen resolution (width x height):720 x 1544, Pixel density:268 ppi, Display size:6.35 inch, OS:Android

Color:Blue/Red/Purple/White, Dimensions (width x height x thickness):3.0 inches (76.6 mm) x 6.5 inches (165.3 mm) x 0.3 inches (8.8 mm), Weight:208 oz (208 g), Display type:IPS LCD, Screen resolution (width x height):1080 x 2400, Pixel density:394 ppi, Display size:6.67 inch, OS:Android

Color:Cosmic Black/Cosmic Grey/Cloud Blue/Cloud White/Aura Red, Dimensions (width x height x thickness):2.9 inches (73.7 mm) x 6.4 inches (161.9 mm) x 0.3 inches (7.8 mm), Weight:188 oz (188 g), Display type:Dynamic AMOLED 2X, Screen resolution (width x height):1440 x 3200, Pixel density:523 ppi, Display size:6.7 inch, OS:Android

Color:Forest Green/Aether Black/Bolivia Blue, Dimensions (width x height x thickness):3.1 inches (79 mm) x 6.8 inches (173.4 mm) x 0.3 inches (8.8 mm), Weight:206 oz (206 g), Display type:IPS LCD, Screen resolution (width x height):720 x 1640, Pixel density:257 ppi, Display size:6.95 inch, OS:Android

Color:Glacial Green/Ultramarine Blue/Onyx Black, Dimensions (width x height x thickness):2.9 inches (74.4 mm) x 6.5 inches (165.3 mm) x 0.3 inches (8.5 mm), Weight:199 oz (199 g), Display type:Fluid AMOLED, Screen resolution (width x height):1440 x 3168, Pixel density:513 ppi, Display size:6.78 inch, OS:Android

Color:Nebula Blue/Jade Black, Dimensions (width x height x thickness):3.0 inches (75.2 mm) x 6.3 inches (159.3 mm) x 0.3 inches (8.7 mm), Weight:186.7 oz (186.7 g), Display type:AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:403 ppi, Display size:6.38 inch, OS:Android