Product
Vivo Y77
Vivo Y77
Samsung Galaxy J4
Samsung Galaxy J4
Battery
Charging 18W wired -
Music play - Up to 80 h
Talk time - Up to 20 h (3G)
Type 5000 mAh Li-Ion 3000 mAh, removable
Body
Build Glass front, plastic frame, plastic back Glass front, plastic back, plastic frame
Dimensions 164 x 75.8 x 8.3 mm (6.46 x 2.98 x 0.33 in) 151.7 x 77.2 x 8.1 mm (5.97 x 3.04 x 0.32 in)
SIM Nano-SIM + Nano-SIM Dual SIM (Micro-SIM, dual stand-by)
Weight 194 g (6.84 oz) 175 g (6.17 oz)
Comms
Bluetooth 5.1, A2DP, LE, aptX HD 4.2, A2DP, LE
NFC No No
Positioning GPS, GLONASS, GALILEO, BDS, QZSS GPS, GLONASS, BDS
Radio FM radio FM radio
USB USB Type-C 2.0, OTG microUSB 2.0
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Display
Resolution 1080 x 2408 pixels, 20:9 ratio (~401 ppi density) 720 x 1280 pixels, 16:9 ratio (~267 ppi density)
Size 6.58 inches, 104.3 cm2 (~83.9% screen-to-body ratio) 5.5 inches, 83.4 cm2 (~71.2% screen-to-body ratio)
Type IPS LCD Super AMOLED
Features
Sensors Fingerprint (side-mounted), accelerometer, proximity, compass Accelerometer, proximity
Launch
Announced 2022, July 04 2018, May. Released 2018, May
Status Available. Released 2022, July 07 Discontinued
Main Camera
Dual 50 MP, f/1.8, 26mm (wide), PDAF 2 MP, f/2.4, (macro) -
Features LED flash, HDR, panorama LED flash, panorama, HDR
Single - 13 MP, f/1.9, 28mm (wide), AF
Video 1080p@30fps 1080p@30fps
Memory
Card slot microSDXC (uses shared SIM slot) microSDXC (dedicated slot)
Internal 128GB 8GB RAM, 256GB 8GB RAM 16GB 2GB RAM, 32GB 2GB RAM, 32GB 3GB RAM
  - eMMC 5.0
Misc
Colors Glowing galaxy, Starlight black Black, Gold, Orchid Gray
Models V2169 SM-J400G, SM-J400F, SM-J400M
SAR - 0.36 W/kg (head)     1.49 W/kg (body)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40, 41 1, 3, 5, 7, 8, 20, 38, 40 - India, Pakistan
5G bands 1, 3, 28, 40, 41, 78 SA/NSA -
Speed HSPA, LTE, 5G HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
Technology GSM / HSPA / LTE / 5G GSM / HSPA / LTE
  - HSDPA 850 / 900 / 2100 - India, Pakistan
Platform
Chipset Mediatek Dimensity 810 (6 nm) Exynos 7570 Quad (14 nm)
CPU Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55) Quad-core 1.4 GHz Cortex-A53
GPU Mali-G57 MC2 Mali-T720 MP2
OS Android 12, Funtouch 12 Android 8.0 (Oreo)
Selfie camera
Features - LED flash
Single 16 MP, f/2.0, (wide) 5 MP, f/2.2
Video 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes