Comparison of Vivo X21 UD and Vivo X21

Comparison of Vivo X21 UD and Vivo X21 [S]ave

Attribute	Vivo X21 UD ×	Vivo X21 ×
General
Brand	Vivo	Vivo
Launch
Announced	2018-03-01	2018-03-01
Body
Width (mm)	7.4	7.4
Length (mm)	154.5	154.5
Height (mm)	74.8	74.8
Weight (g)	156.2	156.2
SIM	Hybrid Dual SIM (Nano-SIM, dual stand-by)	Hybrid Dual SIM (Nano-SIM, dual stand-by)
Front	Glass	Glass
Back	Aluminum	Aluminum
Frame	Aluminum	Aluminum
Network
Technology	CDMA GSM HSPA LTE	CDMA GSM HSPA LTE
2G bands	CDMA 800 & TD GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2	CDMA 800 & TD GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands	HSDPA 850 / 900 / 1900 / 2100	HSDPA 850 / 900 / 1900 / 2100
4G bands	1, 2, 3, 5, 8, 34, 38, 39, 40, 41	1, 2, 3, 5, 8, 34, 38, 39, 40, 41
Speed	HSPA 42.2/5.76 Mbps LTE-A (2CA) Cat6 300/50 Mbps	HSPA 42.2/5.76 Mbps LTE-A (2CA) Cat6 300/50 Mbps
Platform
OS	Android 8.1 (Oreo)	Android 8.1 (Oreo)
Chipset	Qualcomm SDM660 Snapdragon 660 (14 nm)	Qualcomm SDM660 Snapdragon 660 (14 nm)
CPU	Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)	Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)
GPU	Adreno 512	Adreno 512
Memory
Card slot	microSDXC (uses shared SIM slot)	microSDXC (uses shared SIM slot)
Internal	128GB 6GB RAM	128GB 6GB RAM 64GB 6GB RAM
Display
Size (in)	6.28	6.28
Resolution (px)	1080 x 2280	1080 x 2280
Protection	Corning Gorilla Glass 3	Corning Gorilla Glass 3
Display Type	Super AMOLED	Super AMOLED
Battery
Type	Li-Ion	Li-Ion
Charging	Fast charging 18W	Fast charging 18W
Capcity (mAh)	3200	3200
Main Camera
Main Camera Type	Dual	Dual
Main Camera Properties	12 MP, f/1.8, 1/2.55", 1.4µm, dual pixel PDAF 5 MP, f/2.4, (depth)	12 MP, f/1.8, 1/2.55", 1.4µm, dual pixel PDAF 5 MP, f/2.4, (depth)
Main Camera Video	1080p@30fps	1080p@30fps
Main Camera Features	LED flash, HDR, panorama	LED flash, HDR, panorama
Selfie Camera
Selfie Camera Type	Single	Single
Selfie Camera Properties	12 MP, f/2.0, (wide), 1/2.8", 1.28µm	12 MP, f/2.0, (wide), 1/2.8", 1.28µm
Selfie Camera Video	1080p@30fps	1080p@30fps
Comms
WLAN	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
Bluetooth	5.0, A2DP, LE	5.0, A2DP, LE
GPS	+	+
NFC	-	-
Radio	FM radio	FM radio
USB	microUSB 2.0, USB On-The-Go	microUSB 2.0, USB On-The-Go
Sound
Loudspeaker	+	+
3.5mm jack	+	+
Features
Sensors	Fingerprint (under display accelerometer compass optical) proximity	Fingerprint (rear-mounted) accelerometer compass proximity
Misc
Colors	Black Ruby Red	Aurora White Black Ruby Red
Models	X21UD A	1725 X21A