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	Compare with vivo Y51a	Compare with vivo Y31 (2015)
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vivo Y51a

vivo Y31 (2015)

Network
Technology	GSM / HSPA / LTE	GSM / HSPA
2G bands	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Network	HSDPA 850 / 900 / 2100	HSDPA 850 / 900 / 2100
4G Network	1, 3, 5, 8, 40
Speed	HSPA, LTE	HSPA

Launch
Announced	2021, January 08	2015, September. Released 2015, October
Status	Available. Released 2021, January 23	Discontinued

Body
Dimensions	163.9 x 75.3 x 8.4 mm (6.45 x 2.96 x 0.33 in)	137.2 x 68.8 x 8.4 mm (5.40 x 2.71 x 0.33 in)
Weight	188 g (6.63 oz)	137 g (4.83 oz)
SIM	Dual SIM (Nano-SIM, dual stand-by)	Dual SIM

Display
Type	IPS LCD	IPS LCD
Size	6.58 inches, 104.3 cm2 (~84.5% screen-to-body ratio)	4.7 inches, 60.9 cm2 (~64.5% screen-to-body ratio)
Resolution	1080 x 2408 pixels, 20:9 ratio (~401 ppi density)	720 x 1280 pixels, 16:9 ratio (~312 ppi density)

Platform
OS	Android 11, upgradable to Android 12, Funtouch 12	Android 5.1 (Lollipop), Funtouch 2.1
Chipset	Qualcomm SM6115 Snapdragon 662 (11 nm)	Mediatek MT6580 (28 nm)
CPU	Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)	Quad-core 1.3 GHz Cortex-A7
GPU	Adreno 610	Mali-400MP2

Memory
Card slot	microSDXC (dedicated slot)	microSDXC (dedicated slot)
Internal	128GB 6GB RAM, 128GB 8GB RAM	8GB 1GB RAM

Main Camera
Modules	48 MP, f/1.8, (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 120˚, (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro)	8 MP
Features	LED flash, HDR, panorama	LED flash, HDR
Video	4K@30fps, 1080p@30fps, gyro-EIS	720p@30fps

Selfie Camera
Modules	16 MP, f/2.0, (wide), 1/3.06" 1.0µm	2 MP
Features	HDR
Video	1080p@30fps

Sound
Loudspeaker	Yes	Yes
3.5mm jack	Yes	Yes

Comms
WLAN	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct	Wi-Fi 802.11 b/g/n, hotspot
Bluetooth	5.0, A2DP, LE	4.0, A2DP
Positioning	GPS, GLONASS, GALILEO, BDS	GPS
NFC	No	No
Infrared port	No	No
Radio	FM radio	FM radio
USB	USB Type-C 2.0, OTG	microUSB 2.0

Features
Sensors	Fingerprint (side-mounted), accelerometer, gyro, proximity, compass	Accelerometer, proximity, compass

Battery
Type	5000 mAh, non-removable	2100 mAh, removable
Charging	18W wired, 70% in 67 min (advertised)

Misc
Colors	Titanium Sapphire, Crystal Symphony	White, Black
SAR	0.87 W/kg (head)     0.39 W/kg (body)
Models	V2031	Y31L, Y31
Price	About 200 EUR	About 130 EUR