Product
Vivo Y55
Vivo Y55
Vivo Y400 Pro
Vivo Y400 Pro
Battery
Charging 44W wired, 50% in 27 min 90W wired, 50% in 19 min 6W reverse wired
Type 5000 mAh Li-Ion 5500 mAh
Body
Build Glass front, plastic frame, plastic back Glass front, plastic back, plastic frame
Dimensions 160.8 x 73.8 x 8.4 mm (6.33 x 2.91 x 0.33 in) 163.8 x 75.0 x 7.5 or 7.7 mm
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 182 g (6.42 oz) 182 g (6.42 oz)
  - IP65 dust tight and water resistant (low pressure water jets)
Comms
Bluetooth 5.0, A2DP, LE 5.4, A2DP, LE
Infrared port - Yes
NFC No No
Positioning GPS, GLONASS, GALILEO, BDS GPS, GLONASS, GALILEO, BDS, QZSS
Radio FM radio No
USB USB Type-C 2.0, OTG USB Type-C 2.0, OTG
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct Wi-Fi 802.11 a/b/g/n/ac, dual-band
Display
Protection Schott Xensation glass -
Resolution 1080 x 2400 pixels, 20:9 ratio (~409 ppi density) 1080 x 2392 pixels (~388 ppi density)
Size 6.44 inches, 100.1 cm2 (~84.4% screen-to-body ratio) 6.77 inches, 110.9 cm2 (~90.3% screen-to-body ratio)
Type AMOLED AMOLED, 120Hz, HDR, 1300 nits (HBM), 4500 nits (peak)
Features
Sensors Fingerprint (under display, optical), accelerometer, gyro, proximity, compass Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
  - Circle to Search
Launch
Announced 2022, July 02 2025, June 20
Status Available. Released 2022, July 02 Available. Released 2025, June 27
Main Camera
Dual - 50 MP, f/1.8, (wide), 1/1.95", 0.8µm, PDAF 2 MP, f/2.4, (depth)
Features LED flash, HDR, panorama Ring-LED flash, panorama, HDR
Triple 50 MP, f/1.8, (wide), 1/2.76", 0.64µm, PDAF 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) -
Video 1080p@30fps, gyro-EIS 4K@30fps, 1080p@30fps, gyro-EIS
Memory
Card slot microSDXC (dedicated slot) No
Internal 128GB 8GB RAM 128GB 8GB RAM, 256GB 8GB RAM
  - UFS 3.1
Misc
Colors Midnight Galaxy, Ice Dawn Fest Gold, Freestyle White, Nebula Purple
SAR - 0.90 W/kg (head)    
SAR EU - 0.85 W/kg (head)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 2100 HSDPA 850 / 900 / 2100
4G bands 1, 3, 5, 8, 40 1, 3, 5, 8, 28, 38, 40, 41
5G bands - 1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA
Speed HSPA, LTE HSPA, LTE, 5G
Technology GSM / HSPA / LTE GSM / HSPA / LTE / 5G
Platform
Chipset Qualcomm SM6225 Snapdragon 680 4G (6 nm) Mediatek Dimensity 7300 (4 nm)
CPU Octa-core (4x2.4 GHz Kryo 265 Gold & 4x1.9 GHz Kryo 265 Silver) Octa-core (4x2.5 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)
GPU Adreno 610 Mali-G615 MC2
OS Android 12, Funtouch 12 Android 15, Funtouch 15
Selfie camera
Single 16 MP, f/2.0, (wide) 32 MP, f/2.5, (wide)
Video 1080p@30fps 4K@30fps, 1080p@30fps
Sound
3.5mm jack Yes No
Loudspeaker Yes Yes, with stereo speakers
  24-bit/192kHz Hi-Res audio 24-bit/192kHz Hi-Res & Hi-Res wireless audio