| Product |
Vivo Y81i
|
Oppo K13x
|
| 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 7.9 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) |
194 g (6.84 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 |
5.4, A2DP, LE, aptX HD |
| 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 |
- |
| 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, 850 nits (typ), 1000 nits (HBM) |
| Features |
| Sensors |
Accelerometer, proximity, compass |
Fingerprint (side-mounted), accelerometer, proximity, compass |
| Launch |
| Announced |
2018, October. Released 2018, November |
2025, June 23 |
| Status |
Discontinued |
Available. Released 2025, June 27 |
| Main Camera |
| Dual |
- |
50 MP, f/1.8, (wide), PDAF
2 MP, f/2.4, (wide) |
| Features |
LED flash, HDR, panorama |
LED flash, HDR, panorama |
| Single |
13 MP, f/2.2, PDAF |
- |
| Video |
1080p@30fps |
1080p@30fps |
| Memory |
| Card slot |
microSDXC (dedicated slot) |
microSDXC |
| Internal |
16GB 2GB RAM |
128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM |
| |
eMMC 5.1 |
UFS 2.2 |
| Misc |
| Colors |
Black, Red |
Sunset Peach, Midnight Violet |
| Models |
1812, 1812_19 |
CPH2753 |
| SAR |
- |
1.18 W/kg (head) 1.05 W/kg (body) |
| Network |
| 2G bands |
GSM 850 / 900 / 1800 / 1900 |
GSM 850 / 900 / 1800 / 1900 |
| 3G bands |
HSDPA 850 / 900 / 2100 |
HSDPA 900 / 2100 |
| 4G bands |
1, 3, 5, 7, 8, 38, 40, 41 |
1, 3, 5, 8, 28, 40, 41 |
| 5G bands |
- |
1, 3, 5, 8, 28, 40, 41, 77, 78 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 |
| Features |
- |
Panorama |
| Single |
5 MP, f/2.2 |
8 MP, f/2.0, (wide) |
| Video |
|
1080p@30fps |
| Sound |
| 3.5mm jack |
Yes |
Yes |
| Loudspeaker |
Yes |
Yes |
