vivo Y31 - Full Phone Specifications

The vivo Y31 refers to two different generations of phones: the original 2021 model and the newer 2025/2026 Y31 5G. The original vivo Y31 (2021) is a 4G smartphone powered by a Qualcomm Snapdragon 662 with a 6.58″ FHD+ IPS display, 48 MP + 2 MP + 2 MP triple rear cameras, a 16 MP front camera, 5000 mAh battery with 18 W charging, and runs Android 11 with Funtouch OS 11 from 2021.

Recent market listings also refer to a “vivo Y31 (2025/5G)” version with Android 15, Snapdragon 4 Gen 2 chipset, 5G support, 6500 mAh battery with 44 W fast charging, and updated cameras/displays, indicating that the Y31 name has been reused for a newer 5G‑capable device in 2025.

 

LAUNCH	Announced	2025, September 15
	Status	Available. Released 2025, September 15
FEATURES	Sensors	Fingerprint (side-mounted), accelerometer, proximity, compass
DISPLAY	Type	IPS LCD, 120Hz, 1000 nits (HBM)
	Size	6.68 inches, 107.4 cm2 (~84.0% screen-to-body ratio)
	Resolution	720 x 1608 pixels, 20:9 ratio (~264 ppi density)
	Protection	Guardian Glass (ion-strengthened)
NETWORK	Technology	GSM / HSPA / LTE / 5G
	2G bands	GSM 850 / 900 / 1800 / 1900
	3G bands	HSDPA 850 / 900 / 2100
	4G bands	1, 3, 5, 8, 28, 38, 40, 41
	5G bands	1, 3, 5, 8, 28, 40, 77, 78 SA/NSA
	Speed	HSPA, LTE, 5G

PLATFORM	OS	Android 15, Funtouch 15
	Chipset	Qualcomm SM4450 Snapdragon 4 Gen 2 (4 nm)
	CPU	Octa-core (2x2.2 GHz Cortex-A78 & 6x1.95 GHz Cortex-A55)
	GPU	Adreno 613
BODY	Dimensions	166.1 x 77 x 8.4 mm (6.54 x 3.03 x 0.33 in)
	Weight	209 g (7.37 oz)
	SIM	Nano-SIM + Nano-SIM
		IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min)
		MIL-STD-810H compliant*
		* does not guarantee ruggedness or use in extreme conditions
COMMS	WLAN	Wi-Fi 802.11 a/b/g/n/ac, dual-band
	Bluetooth	4.2, A2DP, LE
	Positioning	GPS, GLONASS, GALILEO, BDS, QZSS
	NFC	No
	Radio	No
	USB	USB Type-C 2.0, OTG
MAIN CAMERA	Single	50 MP, f/1.8, (wide), PDAF
		Auxiliary lens
	Features	Ring-LED flash, panorama
	Video	1080p@30fps
SELFIE CAMERA	Single	8 MP, f/2.0, (wide)
	Video	1080p@30fps

SOUND	Loudspeaker	Yes, with stereo speakers
	3.5mm jack	No
		24-bit/192kHz Hi-Res audio
MEMORY	Card slot	microSDXC (uses shared SIM slot)
	Internal	128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM
		eMMC 5.1
BATTERY	Type	Li-Ion 6500 mAh
	Charging	44W wired, 50% in 38 min
		Reverse wired
MISC	Colors	Rose Red, Diamond Green
	SAR	1.13 W/kg (head)  0.99 W/kg (body)

Carrier Compatibility (USA / Global)

Original 2021 vivo Y31:

• Network: Supports 2G / 3G / 4G LTE (no 5G).
• USA: An unlocked unit can work on GSM‑based carriers (e.g., T‑Mobile, AT&T) if its LTE bands align with the carrier’s network bands. Advanced features like VoLTE or Wi‑Fi Calling depend on carrier certification and may not be available on all firmware.
• Global: Works on GSM/3G/LTE networks across Asia, Europe, Africa, and elsewhere when unlocked — verify the specific LTE bands for full local coverage.

Newer 2025/2026 Y31 5G variant:

• Network: Supports GSM / HSPA / LTE / 5G (SA/NSA) for broader connectivity including 5G.
• USA / Global: An unlocked unit is generally compatible with GSM carriers worldwide (including U.S. carriers like T‑Mobile/AT&T) when the supported LTE/5G bands align with the carrier’s requirements; as always, check specific supported bands with your carrier for complete coverage.

 

Final Summary

vivo Y31 can refer to either the original 2021 4G model with Snapdragon 662 and a 5000 mAh battery or a newer 2025/2026 5G‑enabled version with Snapdragon 4 Gen 2, 6500 mAh battery, and modern features. The original supports 2G/3G/4G, while the newer model supports 5G in addition to GSM/LTE. Both can operate on global networks when unlocked and bands match carrier requirements — though advanced network feature support depends on carrier certification and specific regional variants.