Vivo
Vivo X21

Vivo
Vivo X20

Features
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Fingerprint (rear-mounted), accelerometer, proximity, compass, - Fast battery charging
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass, - Fast battery charging 9V/2A 18W
Memory
microSD, up to 256 GB (uses SIM 2 slot), 64 GB, 4 GB RAM
microSD, up to 256 GB (uses SIM 2 slot), 64/128 GB, 6 GB RAM
microSD, up to 256 GB (uses SIM 2 slot), 64 GB, 4 GB RAM
Display
1080 x 2160 pixels, 18:9 ratio (~376 ppi density), Super AMOLED, 6.43 inches, 106.7 cm2 (~80.6% screen-to-body ratio)
1080 x 2280 pixels, 19:9 ratio (~402 ppi density), Super AMOLED capacitive touchscreen, 16M colors, 6.28 inches, 98.4 cm2 (~85.2% screen-to-body ratio), - Funtouch OS 4
1080 x 2160 pixels, 18:9 ratio (~402 ppi density), Super AMOLED capacitive touchscreen, 16M colors, 6.01 inches, 93.2 cm2 (~79.5% screen-to-body ratio), - Funtouch 3.2
Battery
Fast charging 22.5W, Li-Ion 3900 mAh, non-removable
Non-removable Li-Ion 3200 mAh battery
Non-removable Li-Ion 3250 mAh battery
Selfie Camera
12 MP, f/2.0, (wide), 1/2.8", 1.28µm
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Main Camera
1080p@30fps, LED flash, HDR, panorama, 12 MP, f/1.8, AF, 5 MP, depth sensor
1080p@30fps, LED flash, HDR, panorama, 12 MP, f/1.8, 1/2.55", 1.4µm, dual pixel PDAF, 5 MP, f/2.4, depth sensor
1080p@30fps, LED flash, HDR, panorama, 12 MP, f/1.8, AF, 5 MP, depth sensor