Product
Vivo Y77
Vivo Y77
Samsung Galaxy J8
Samsung Galaxy J8
Battery
Charging 18W wired -
Music play - Up to 112 h
Talk time - Up to 23 h (3G)
Type 5000 mAh Li-Ion 3500 mAh, non-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) 159.2 x 75.7 x 8.2 mm (6.27 x 2.98 x 0.32 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 194 g (6.84 oz) 177 g (6.24 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, recording
USB USB Type-C 2.0, OTG microUSB 2.0, OTG
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 1480 pixels, 18.5:9 ratio (~274 ppi density)
Size 6.58 inches, 104.3 cm2 (~83.9% screen-to-body ratio) 6.0 inches, 91.4 cm2 (~75.8% screen-to-body ratio)
Type IPS LCD Super AMOLED
Features
Sensors Fingerprint (side-mounted), accelerometer, proximity, compass Fingerprint (rear-mounted), accelerometer, proximity
Launch
Announced 2022, July 04 2018, May. Released 2018, July
Status Available. Released 2022, July 07 Discontinued
Main Camera
Dual 50 MP, f/1.8, 26mm (wide), PDAF 2 MP, f/2.4, (macro) 16 MP, f/1.7, AF 5 MP, f/1.9, (depth)
Features LED flash, HDR, panorama LED flash, panorama, HDR
Video 1080p@30fps 1080p@30fps
Memory
Card slot microSDXC (uses shared SIM slot) microSDXC (dedicated slot)
Internal 128GB 8GB RAM, 256GB 8GB RAM 32GB 3GB RAM, 64GB 4GB RAM
  - eMMC 5.1
Misc
Colors Glowing galaxy, Starlight black Black, Gold, Blue, Purple
Models V2169 SM-J810G, SM-J810F, J810Y, SM-J810Y, SM-J810GF, SM-J810M
SAR EU - 0.57 W/kg (head)     1.18 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 / 1700(AWS) / 1900 / 2100
4G bands 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40, 41 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 38, 40, 41, 66 - J810Y/DS
5G bands 1, 3, 28, 40, 41, 78 SA/NSA -
Speed HSPA, LTE, 5G HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
Technology GSM / HSPA / LTE / 5G GSM / HSPA / LTE
Platform
Chipset Mediatek Dimensity 810 (6 nm) Qualcomm SDM450 Snapdragon 450 (14 nm)
CPU Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55) Octa-core 1.8 GHz Cortex-A53
GPU Mali-G57 MC2 Adreno 506
OS Android 12, Funtouch 12 Android 8.0 (Oreo), upgradable to Android 9.0 (Pie)
Selfie camera
Features - LED flash
Single 16 MP, f/2.0, (wide) 16 MP, f/1.9, 26mm (wide), 1/3.06", 1.0µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes