Compare OnePlus 5T with 4015 devices. You can see which you should buy through this compiled table

Color:ー / ー/, Dimensions (width x height x thickness):2.5 inches (64 mm) x 5.1 inches (130 mm) x 0.5 inches (12.9 mm), Weight:138 oz (138 g), Display type:TFT, Screen resolution (width x height):480 x 800, Pixel density:233 ppi, Display size:4 inch, OS:Android

Color:ー/ ー, Dimensions (width x height x thickness):2.8 inches (70.9 mm) x 5.7 inches (143.6 mm) x 0.3 inches (7.7 mm), Weight:174 oz (174 g), Display type:True Tone ー HDR Super Retina HD, Screen resolution (width x height):1125 x 2436, Pixel density:462 ppi, Display size:5.8 inch, OS:IOS

Color:ー/ ー / ー /, Dimensions (width x height x thickness):3.1 inches (78.1 mm) x 6.2 inches (158.4 mm) x 0.3 inches (7.5 mm), Weight:202 oz (202 g), Display type:True Tone ー Retina HD, Screen resolution (width x height):1080 x 1920, Pixel density:400 ppi, Display size:5.5 inch, OS:IOS

Color:Black lens+Dark Gray Frame and accents+ Black Soft Feel Inlay/White lens+Silver Frame and accents+Bamboo Inlay, Dimensions (width x height x thickness):3 inches (76.2 mm) x 6.1 inches (153.9 mm) x 0.4 inches (11.1 mm), Weight:179 oz (179 g), Display type:IPS LCD, Screen resolution (width x height):1440 x 2560, Pixel density:515 ppi, Display size:5.7 inch, OS:Android

Color:Carbon Black, Dimensions (width x height x thickness):2.8 inches (71.6 mm) x 5.9 inches (150.9 mm) x 0.5 inches (12.2 mm), Weight:230 oz (230 g), Display type:Dual IPS LCD, Screen resolution (width x height):1080 x 1920, Pixel density:423 ppi, Display size:5.2 inch, OS:Android

Color:Silver/Gold, Dimensions (width x height x thickness):2.9 inches (74.6 mm) x 6.0 inches (151.9 mm) x 0.3 inches (6.9 mm), Weight:142.6 oz (142.6 g), Display type:AMOLED, Screen resolution (width x height):720 x 1280, Pixel density:267 ppi, Display size:5.5 inch, OS:Android

Color:Gray,gold,rose gold, Dimensions (width x height x thickness):2.9 inches (73.6 mm) x 5.7 inches (146 mm) x 0.4 inches (10.5 mm), Weight:141 oz (141 g), Display type:IPS LCD, Screen resolution (width x height):720 x 1280, Pixel density:293 ppi, Display size:5 inch, OS:Android

Color:Aquamarine Green/Sandy Silver/Titanium Black, Dimensions (width x height x thickness):2.9 inches (73 mm) x 5.7 inches (145 mm) x 0.3 inches (8.8 mm), Weight:150 oz (150 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/Silver White/Forest Green/Bordeaux Red, Dimensions (width x height x thickness):2.9 inches (73 mm) x 6.2 inches (158 mm) x 0.4 inches (9.9 mm), Weight:193 oz (193 g), Display type:P-OLED, Screen resolution (width x height):1440 x 2880, Pixel density:536 ppi, Display size:6 inch, OS:Android

Color:Nebula Red/Neptune Blue/Space Black/Astro White, Dimensions (width x height x thickness):3.0 inches (75.2 mm) x 6.3 inches (159.2 mm) x 0.3 inches (8.1 mm), Weight:186 oz (186 g), Display type:IPS LCD, Screen resolution (width x height):1080 x 2340, Pixel density:409 ppi, Display size:6.3 inch, OS:Android

Color:Blue, Dimensions (width x height x thickness):2.9 inches (73.4 mm) x 6.3 inches (159.2 mm) x 0.3 inches (7.9 mm), Weight:175 oz (175 g), Display type:AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:398 ppi, Display size:6.47 inch, OS:Android

Color:Gradient Blue/Gradient red/Magic Night Black, 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:164 oz (164 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:Seawater Blue/Midnight Blue/Cocktail Orange, Dimensions (width x height x thickness):2.9 inches (73.9 mm) x 6.1 inches (155.3 mm) x 0.3 inches (7.9 mm), Weight:168 oz (168 g), Display type:PLS TFT, Screen resolution (width x height):1080 x 2340, Pixel density:409 ppi, Display size:6.3 inch, OS:Android

Color:Aura Glow/Aura White/Aura Black/Aura Pink/Aura Red, Dimensions (width x height x thickness):2.8 inches (71.8 mm) x 5.9 inches (151 mm) x 0.3 inches (7.9 mm), Weight:168 oz (168 g), Display type:Dynamic AMOLED, Screen resolution (width x height):1080 x 2280, Pixel density:400 ppi, Display size:6.3 inch, OS:Android

Color:Fancy Sky/Knight Black/Nebula Blue, 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:Super AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:403 ppi, Display size:6.38 inch, OS:Android

Color:Mirror Black/Mirror Purple/Mirror Gold/Thom Browne Edition, Dimensions (width x height x thickness):2.9 inches (73.6 mm) x 6.6 inches (167.3 mm) x 0.3 inches (7.2 mm), Weight:183 oz (183 g), Display type:Foldable Dynamic AMOLED, Screen resolution (width x height):1080 x 2636, Pixel density:425 ppi, Display size:6.7 inch, OS:Android

Color:Black/White, Dimensions (width x height x thickness):2.7 inches (69 mm) x 6.2 inches (157 mm) x 0.3 inches (8.2 mm), Weight:151 oz (151 g), Display type:OLED, Screen resolution (width x height):1080 x 2520, Pixel density:456 ppi, Display size:6 inch, OS:Android

Color:Black/Blue/Orange, Dimensions (width x height x thickness):3.0 inches (76.1 mm) x 6.6 inches (167.4 mm) x 0.4 inches (9.4 mm), Weight:219.5 oz (219.5 g), Display type:Super AMOLED, Screen resolution (width x height):1080 x 2256, Pixel density:363 ppi, Display size:6.89 inch, OS:Android

Color:Arctic Blue/Crystal White, Dimensions (width x height x thickness):2.9 inches (74.2 mm) x 6.3 inches (159 mm) x 0.3 inches (8.5 mm), Weight:176 oz (176 g), Display type:Super AMOLED, Screen resolution (width x height):1080 x 2400, Pixel density:408 ppi, Display size:6.44 inch, OS:Android

Color:Arctic White/Mariana Blue, Dimensions (width x height x thickness):3.0 inches (75.6 mm) x 6.4 inches (162.2 mm) x 0.3 inches (8.4 mm), Weight:180 oz (180 g), Display type:IPS LCD, Screen resolution (width x height):1080 x 2340, Pixel density:394 ppi, Display size:6.53 inch, OS:Android

Color:Aurora Blue/Glacier White/Interstellar Black, Dimensions (width x height x thickness):3.0 inches (76.7 mm) x 6.5 inches (165.8 mm) x 0.3 inches (8.8 mm), Weight:209 oz (209 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: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

Color:Blue/White/Red/Purple, 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