BLU Vivo 8 vs Oppo K3

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900, CDMA 800
3G network

HSDPA 850, 1700(AWS), 1900, 2100

HSDPA 800, 850, 900, 1700/2100, 1900, 2100, TD-SCDMA 1880-1920, 2010-2025
4G network

LTE frequency band 1(2100), 2(1900), 4(1700/2100), 5(850), 7(2600), 28(700)

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 8(900), 12(700), 17(700), 18(800), 19(800), 26(850), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
HSDPA speed

42.2 Mbps

-
HSUPA speed

11.5 Mbps

-
EV-DO speed

-

3.1 Mbps download, 1.8 Mbps upload
LTE speed

-

LTE Cat 15, 798.0 Mbps download, 226.0 Mbps upload
LTE-A speed

LTE-A, (2CA) Cat6, 300 Mbps download, 50 Mbps upload

-
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

-

Plastic
SIM

Dual SIM (Micro-SIM/Nano-SIM, dual stand-by)

Dual SIM (Nano-SIM, dual SIM stand-by)
Height

154.5 mm

161.2 mm
Width

76.5 mm

76 mm
Thickness

8.3 mm

9.4 mm
Weight

180 g

191 g
Colors

Black, Gold

Green, White, Purple

Display
Display type

IPS LCD capacitive touchscreen

AMOLED capacitive touchscreen
Physical size

5.5 inches

6.5 inches
Resolution

1080 x 1920 pixels

1080 x 2340 pixels
Pixel density

401 ppi

396 ppi
Display colors

16777216

16777216
Protection

-

2.5D curved glass screen, Scratch resistant, Corning Gorilla Glass 5
Multitouch

Yes

Yes

Main camera
Camera type

-

Dual
Main camera

13 MP, f/2.0

16 MP, f/1.7 , 1/2.5" , 1.12 µm
2 MP, f/2.4
Primary camera resolution

-

4608 x 3456 pixels
Primary camera video

1080p@30fps

2160@30fps, 1080@120fps, 720@240fps
Primary camera Autofocus

phase detection autofocus

-
Primary camera flash

LED flash

dual LED flash
Camera features

1.12 µm pixel size, 1/3" sensor size, HDR, face detection, geo-tagging, touch focus

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

Connectivity
WLAN

Wi-Fi 802.11b, 802.11g, 802.11n, 802.11ac

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

Yes

Yes
WLAN WiFi Direct

Yes

Yes
Wi-Fi display

-

Yes
WLAN WiFi Dual Band

-

Yes
USB

microUSB 2.0

Type-C reversible connector
USB On-The-Go

-

Yes
USB host

Yes

-
Bluetooth

v4.0

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

-

Yes
Bluetooth EDR

-

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

-

Yes
GALILEO

-

Yes
Beidou

-

Yes

Features
Messaging SMS

SMS(threaded view)

-
Messaging MMS

MMS

-
Messaging Email

Email

-
Messaging IM

IM

-
Messaging Push Email

Push Email

-
Java

No

-
Sensors

Fingerprint (front-mounted), accelerometer, compass, gyro, proximity

Accelerometer, compass, proximity, light, gyroscope, in-display fingerprint sensor