Xiaomi Redmi 3 vs ZTE nubia X

Network
2G network

GSM 900, 1800, 1900

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

HSDPA 850, 1900, 2100

HSDPA 850, 900, 1900, 2100; CDMA2000 1xEV-DO
4G network

-

LTE frequency band 1(2100), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 20(800), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
HSDPA speed

-

42.2 Mbps
HSUPA speed

-

5.76 Mbps
EV-DO speed

EV-DO

-
LTE speed

-

LTE-A (6CA), Cat18, 1200 Mbps download, 150 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

-

Aluminium alloy, glass
SIM

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

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

139.3 mm

154.1 mm
Width

69.6 mm

73.3 mm
Thickness

8.5 mm

8.4 mm
Weight

144 g

181 g
Colors

Classic Gold, Dark Gray, Gold, Silver

Black, Blue, Gray

Display
Display type

IPS LCD capacitive touchscreen

LTPS IPS LCD capacitive touchscreen
Physical size

5.0 inches

6.26 inches
Resolution

720 x 1280 pixels

1080 x 2280 pixels
Pixel density

294 ppi

403 ppi
Display colors

16777216

16777216
Protection

-

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 3, LTPS(Low temperature PolySilicon)
Multitouch

-

Yes
Secondary screen resolution

-

720 x 1520 pixels
Secondary screen physical size

-

5.1 inches
Secondary display

-

OLED
Secondary display protection

-

Corning Gorilla Glass 3

Hardware
CPU

-

Octa-core
CPU

Quad-core 1.5 GHz ARM Cortex-A53

Quad-core 2.65 GHz Kryo 385 Gold
CPU(second)

quad-core 1.2 GHz ARM Cortex-A53

quad-core 1.8 GHz Kryo 385 Silver
Chipset

Qualcomm MSM8939v2 Snapdragon 616

Qualcomm SDM845 Snapdragon 845
GPU

Adreno 405

Adreno 630
Memory RAM

2 GB

6, 8 GB
Internal storage

16 GB

64, 128, 256 GB
Memory card

microSD

-
Memory card max

128 GB

-

Main camera
Camera type

Photo / Video

-
Camera type

-

Dual
Main camera

13 MP, f/2.0

24 MP, f/1.8
24 MP, f/1.7
Primary camera resolution

-

4608 x 3456 pixels
Primary camera video

1080p@30fps

2160p@30fps, 1080p@30fps
Primary camera Autofocus

phase detection autofocus

-
Primary camera flash

LED flash

dual-LED flash
Primary camera phase detection autofocus

-

phase detection autofocus
Camera features

Geo-tagging, HDR, face/smile detection, panorama, touch focus

Autofocus, continuous shooting, digital zoom, digital image stabilization, 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, 802.11ac
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

-

Yes
USB

microUSB 2.0

Type-C 1.0 reversible connector
USB On-The-Go

-

Yes
Bluetooth

v4.1

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

-

Yes
Infrared

Yes

-
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
Beidou

-

Yes
BDS

Yes

-

Features
Messaging SMS

SMS(threaded view)

-
Messaging MMS

MMS

-
Messaging Email

Email

-
Messaging IM

IM

-
Messaging Push Mail

Push Mail

-
Java

No

-
Sensors

Accelerometer, compass, gyro, proximity

Accelerometer, compass, dual fingerprint, gyro, light, proximity