Oppo A1k vs vivo Y81

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA
3G network

WCDMA 850, 900, 2100

HSDPA 850, 900, 2100
4G network

LTE frequency band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 18(800), 28(700), 38(2600), 40(2300), 41(2500)

LTE frequency band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
LTE speed

LTE Cat 4, 150.8 Mbps download, 51 Mbps upload

LTE, Cat7, 301 Mbps download, 102 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Display
Display type

IPS capacitive touchscreen

IPS capacitive touchscreen
Physical size

6.1 inches

6.22 inches
Resolution

720 x 1560 pixels

720 x 1520 pixels
Pixel density

282 ppi

270 ppi
Display colors

16777216

16777216
Protection

2.5D curved glass screen, scratch resistant, Corning Gorilla Glass 3

Corning Gorilla Glass
Multitouch

Yes

Yes

Main camera
Camera type

Single

-
Main camera

8 MP, f/2.2 , 1/3.2" , 1.4 µm

13 MP, f/2.2
Primary camera resolution

3264 x 2448 pixels

4160 x 3120 pixels
Primary camera video

1080p@30fps

1080p@30fps
Primary camera flash

LED flash

LED flash
Camera features

Autofocus, continuous shooting, digital zoom, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detection

Autofocus, continuous shooting, digital zoom, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode

Connectivity
WLAN

Wi-Fi 802.11b, 802.11g, 802.11n

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

-

Yes
Wi-Fi display

Yes

-
WLAN WiFi Dual Band

-

Yes
USB

microUSB 2.0

microUSB 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v4.2

v4.2
Bluetooth A2DP

Yes

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
Beidou

Yes

-