Compare / vivo Y400 vs S2 FE

vivo Y400 vs S2 FE

A side-by-side comparison of the vivo Y400 and the S2 FE, covering display, chipset, memory, camera, battery and build.

vivo Y400
vivo
vivo Y400
S2 FE
vivo
S2 FE

Overview

Display
vivo Y400
6.67inch
AMOLED · 120 Hz
1080 × 2400 · 395 PPI
S2 FE
6.83inch
AMOLED · 120 Hz
1260 × 2800 · 450 PPI
Chip
vivo Y400
Qualcomm SM4450 Snapdragon 4 Gen 2 (4 nm)
Octa-core (2x2.2 GHz Cortex-A78 & 6x1.95 GHz Cortex-A55)
Adreno 613 · Android 15
S2 FE
Mediatek Dimensity 7300e (6 nm)
Octa-core (4x2.5 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)
Mali-G610 · Android 16
Memory
vivo Y400
8GB RAM
128 GB · 256 GB storage
Unspecified
S2 FE
6 / 8GB RAM
128 GB storage
No card slot
Camera
vivo Y400
50MP
32 MP selfie
1080p@30fps video
S2 FE
50MP
32 MP selfie
Yes video
Battery
vivo Y400
6,000mAh
90 W wired
S2 FE
10,000mAh
44 W wired
Build
vivo Y400
197g
162.3 × 75.3 × 7.9 mm
IP68
S2 FE
224g
163.9 × 76.5 × 8.6 mm
IP68
Connectivity
vivo Y400
5GWi-Fi 5Bluetooth 5.0Nano-SIM + Nano-SIMUSB Type-C 2.0
S2 FE
5GWi-FiBluetooth 5.4Nano-SIM + Nano-SIMUSB Type-C 2.0

Specifications

vivo Y400S2 FE

vivo Y400

Technology
GSM / HSPA / LTE / 5G
2G bands
GSM 850 / 900 / 1800 / 1900
3G bands
HSDPA 800 / 850 / 900 / 2100
4G bands
1, 3, 4, 5, 8, 18, 19, 26, 28, 38, 40, 41, 42, 48
5G bands
1, 3, 5, 8, 28, 40, 77, 78 SA/NSA
Speed
HSPA, LTE, 5G

S2 FE

Technology
GSM / HSPA / LTE / 5G
2G bands
GSM 850 / 900 / 1800 / 1900
3G bands
HSDPA 800 / 850 / 900 / 2100
4G bands
1, 3, 4, 5, 8, 19, 28, 38, 40, 41, 42, 43, 48, 66
5G bands
1, 3, 5, 8, 28, 38, 40, 41, 48, 66, 77, 78 SA/NSA
Speed
HSPA, LTE, 5G

vivo Y400

Announced
2025, August 04
Status
Available. Released 2025, August 07

S2 FE

Announced
2026, October 06
Status
Coming soon. Exp. release 2026, October 20

vivo Y400

Dimensions
162.3 x 75.3 x 7.9 mm (6.39 x 2.96 x 0.31 in)
Weight
197 g (6.95 oz)
Build
Glass front, plastic back, plastic frame
SIM

Nano-SIM + Nano-SIM

IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 2m for 30 min)

MIL-STD-810H compliant*

* does not guarantee ruggedness or use in extreme conditions

S2 FE

Dimensions
163.9 x 76.5 x 8.6 mm (6.45 x 3.01 x 0.34 in)
Weight
224 g (7.90 oz)
Build
Glass front, plastic frame, plastic back
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

vivo Y400

Type
AMOLED, 120Hz, 1200 nits (HBM), 1800 nits (peak)
Size
6.67 inches, 107.4 cm2 (~87.9% screen-to-body ratio)
Resolution
1080 x 2400 pixels, 20:9 ratio (~395 ppi density)

S2 FE

Type
AMOLED1B colors120HzHDR10+1000 nits2000 nits (HBM)
Size
6.83 inches, 112.6 cm2 (~89.8% screen-to-body ratio)
Resolution
1260 x 2800 pixels, 20:9 ratio (~450 ppi density)

vivo Y400

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

S2 FE

OS
Android 16, OriginOS 6
Chipset
Mediatek Dimensity 7300e (6 nm)
CPU
Octa-core (4x2.5 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)
GPU
Mali-G610

vivo Y400

Card slot
Unspecified
Internal

128GB 8GB RAM, 256GB 8GB RAM

UFS 3.1

S2 FE

Card slot
No
Internal

128GB 6GB RAM, 128GB 8GB RAM

UFS 3.1

vivo Y400

Dual

50 MP, f/1.8, (wide), 1/2.96", PDAF

Auxiliary lens

Features
Ring-LED flash, panorama, HDR
Video
1080p@30fps

S2 FE

Dual

50 MP, f/1.8, (wide), 1/2.93", PDAF

Auxiliary lens

Features
LED flash, HDR, panorama
Video
Yes

vivo Y400

Single
32 MP, f/2.5, (wide)
Video
1080p@30fps

S2 FE

Single
32 MP, f/2.0, 22mm (wide)
Video
1080p@30fps

vivo Y400

Loudspeaker
Yes, with stereo speakers
3.5mm jack

No

24-bit/192kHz Hi-Res audio

S2 FE

Loudspeaker
Yes, with stereo speakers
3.5mm jack
No

vivo Y400

WLAN
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
5.0, A2DP, LE
Positioning
GPS, GLONASS, GALILEO, BDS, QZSS
NFC
No
Radio
No
USB
USB Type-C 2.0, OTG

S2 FE

WLAN
Yes
Bluetooth
5.4, A2DP, LE
Positioning
GPS, GALILEO, GLONASS, QZSS, BDS
NFC
No
Radio
No
USB
USB Type-C 2.0, OTG

vivo Y400

Sensors
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass

S2 FE

Sensors
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass

vivo Y400

Type
Li-Ion 6000 mAh
Charging

90W wired, 50% in 20 min

Reverse wired

Bypass Charging

S2 FE

Type
Si/C Li-Ion 10000 mAh
Charging

44W wired

Reverse wired

vivo Y400

Colors
Glam White, Olive Green
SAR
0.99 W/kg (head)     0.80 W/kg (body)    
Price
About 220 EUR

S2 FE

Colors
Stellar Green, Zen White, Titan Black
SAR
1.14 W/kg (head)     1.00 W/kg (body)    
Price
About 360 EUR
Full specs: vivo Y400 Full specs: S2 FE

How the vivo Y400 and S2 FE differ

  • The S2 FE has a larger battery, 10000 mAh against 6000 mAh on the vivo Y400.
  • The S2 FE has the bigger screen, 6.83 inches against 6.67 inches.
  • The S2 FE is the newer of the two, released in September 2026.

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