Product
Vivo Y81i
Vivo Y81i
Oppo A5x
Oppo A5x
Battery
Charging - 45W wired, 33W PPS, 13.5W PD, 50% in 37 min
Type 3260 mAh, non-removable 6000 mAh
Body
Build Glass front (Gorilla Glass), plastic back, plastic frame -
Dimensions 155.1 x 75 x 7.8 mm (6.11 x 2.95 x 0.31 in) 165.7 x 76.2 x 8 mm (6.52 x 3.00 x 0.31 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 143 g (5.04 oz) 193 g (6.81 oz)
  - IP65 dust tight and water resistant (low pressure water jets) MIL-STD-810H compliant* * does not guarantee ruggedness or use in extreme conditions
Comms
Bluetooth 5.0, A2DP, LE 5.1, A2DP, LE
NFC No No
Positioning GPS, GLONASS, BDS GPS, GALILEO, GLONASS, BDS, QZSS
Radio FM radio Unspecified
USB microUSB 2.0, OTG USB Type-C 2.0, OTG
WLAN Wi-Fi 802.11 b/g/n, Wi-Fi Direct Wi-Fi 802.11 a/b/g/n/ac, dual-band
Display
Protection Corning Gorilla Glass Unspecified
Resolution 720 x 1520 pixels, 19:9 ratio (~270 ppi density) 720 x 1604 pixels, 20:9 ratio (~264 ppi density)
Size 6.22 inches, 96.6 cm2 (~83.0% screen-to-body ratio) 6.67 inches, 107.2 cm2 (~84.9% screen-to-body ratio)
Type IPS LCD IPS LCD, 120Hz, 1000 nits (HBM)
Features
Sensors Accelerometer, proximity, compass Fingerprint (side-mounted), accelerometer, proximity, compass
Launch
Announced 2018, October. Released 2018, November 2025, May 23
Status Discontinued Available. Released 2025, May 25
Main Camera
Features LED flash, HDR, panorama LED flash, HDR, panorama
Single 13 MP, f/2.2, PDAF 32 MP, f/1.9, (wide), AF
Video 1080p@30fps Yes
Memory
Card slot microSDXC (dedicated slot) microSDXC
Internal 16GB 2GB RAM 128GB 4GB RAM
  eMMC 5.1 UFS 2.2
Misc
Colors Black, Red Tranquil Lake Green, Laser White
Models 1812, 1812_19 -
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, 7, 8, 38, 40, 41 LTE
5G bands - SA/NSA
Speed HSPA 21.1/5.76 Mbps, LTE (2CA) Cat7 300/150 Mbps HSPA, LTE, 5G
Technology GSM / HSPA / LTE GSM / HSPA / LTE / 5G
Platform
Chipset Mediatek MT6761 Helio A22 (12 nm) Mediatek Dimensity 6300 (6 nm)
CPU Quad-core 2.0 GHz Cortex-A53 Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU PowerVR GE8320 Mali-G57 MC2
OS Android 8.1 (Oreo), Funtouch 4 Android 15, ColorOS 15
Selfie camera
Single 5 MP, f/2.2 5 MP, f/2.2, (wide)
Video Yes
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes