UMIDIGI S2 Pro vs vivo Z3

Network
2G network

GSM 850, 900, 1800, 1900

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

HSDPA 850, 900, 1900, 2100

HSDPA 850, 900, 2100
4G network

LTE frequency band 1(2100), 3(1800), 7(2600), 18(800)

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

-

3.1 Mbps download, 1.8 Mbps upload
LTE speed

LTE, Cat6, 301 Mbps download, 51 Mbps upload

LTE, Cat15, 798 Mbps download, 226 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Display
Display type

IPS capacitive touchscreen

IPS LCD capacitive touchscreen
Physical size

6 inches

6.3 inches
Resolution

1080 x 2160 pixels

1080 x 2280 pixels
Pixel density

402 ppi

400 ppi
Display colors

16777216

16777216
Protection

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 4

2.5D curved glass screen
Multitouch

Yes

Yes

Hardware
CPU

Octa-core

Octa-core
CPU

Quad-core 2.6 GHz Cortex-A53

Dual-core 2.0 / 2.2 GHz Kryo 360 Gold
CPU(second)

quad-core 1.6 GHz Cortex-A53

Hexa-core 1.7 / 2.2 GHz Kryo 360 Silver
Chipset

MediaTek Helio P20(MT6757CD)

Qualcomm SDM670 Snapdragon 670 / Qualcomm SDM710 Snapdragon 710
GPU

Mali-T880 MP2

Adreno 615 / Adreno 616
Memory RAM

6 GB

4, 6 GB
Internal storage

128 GB

64, 128 GB
Memory card

microSD, microSDHC, microSDXC

microSD, microSDHC, microSDXC
Memory card max

256 GB

256 GB
Storage

eMMC 5.1

-

Main camera
Camera type

Dual

Dual
Main camera

13 MP, 1.133 µm

16 MP, f/2.0
5 MP

2 MP, f/2.4
Primary camera resolution

4160 x 3120 pixels

4608 x 3456 pixels
Primary camera video

2160@30fps

1080p@30fps
Primary camera flash

quad-LED flash

dual-LED flash
Primary camera phase detection autofocus

-

phase detection autofocus
Camera features

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

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

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5 GHz

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

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C reversible connector

microUSB 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v4.1

v4.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

-

Yes
Bluetooth EDR

-

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
Beidou

-

Yes

Features
Sensors

Accelerometer, compass, fingerprint, hall, light, proximity

Accelerometer, compass, fingerprint, gyroscope, infrared face recognition, light, proximity