Samsung Galaxy S9+ vs Xiaomi Mi 4s

Network
2G network

GSM 850, 900, 1800, 1900

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

HSDPA 850, 900, 1700(AWS), 1900, 2100

HSDPA 850, 1900, 2100; TD-SCDMA
4G network

LTE

LTE band 1(2100), 3(1800), 7(2600), 38(2600), 39(1900), 40(2300), 41(2500)
HSDPA speed

42.2 Mbps

-
HSUPA speed

5.76 Mbps

-
HSPA speed

-

HSPA
LTE speed

-

LTE, Cat4, 150 Mbps download, 50 Mbps upload
LTE-A speed

LTE-A, (6CA) Cat18, 1200 Mbps download, 200 Mbps upload

-
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Front/back glass (Gorilla Glass 5), aluminum frame

-
SIM

Single SIM (Nano-SIM) or Hybrid Dual SIM (Nano-SIM, dual stand-by)

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

158.1 mm

139.3 mm
Width

73.8 mm

70.8 mm
Thickness

8.5 mm

7.8 mm
Weight

189 g

133 g
Payment

Samsung Pay(Visa, Mastercard certified)

-
Waterproof

IP68, 1.5m and 30 minutes

-
Dust proof

Yes, IP68

-
Colors

Coral Blue, Lilac Purple, Midnight Black, Titanium Gray

Black, Gold, Pink, White

Display
Display type

Super AMOLED capacitive touchscreen

IPS LCD capacitive touchscreen
Physical size

6.2 inches

5.0 inches
Resolution

1440 x 2960 pixels

1080 x 1920 pixels
Pixel density

529 ppi

441 ppi
Display colors

16777216

16777216
Protection

Corning Gorilla Glass 5

-
Multitouch

Yes

Yes
Display features

HDR10 compliant, 3D Touch, Always-on display

-

Hardware
CPU

Octa-core

-
CPU

Quad-core 2.7 GHz Mongoose M3
CPU(second)

quad-core 1.8 GHz Cortex-A55
Chipset

Exynos 9810 Octa / Qualcomm SDM845 Snapdragon 845

Qualcomm MSM8992 Snapdragon 808
GPU

Mali-G72 MP18 / Adreno 630

Adreno 418
Memory RAM

6 GB

3 GB
Internal storage

64, 128, 256 GB

64 GB
Memory card

microSD(uses second SIM slot)

microSD
Memory card max

400 GB

128 GB

Main camera
Camera type

Dual

-
Main camera

12 MP, f/1.5-2.4 , 26 mm, 1/2.55" , 1.4 µm, 2x optical zoom

13 MP, f/2.0
12 MP, f/2.4 , 52 mm, 1/3.6" , 1 µm
Primary camera resolution

4032 x 3024 pixels

-
Primary camera video

2160p@60fps, 1080p@240fps, 720p@960fps

1080p@30fps, 720p@120fps
Primary camera Autofocus

dual pixel phase detection autofocus

phase detection autofocus
Primary camera flash

LED flash

dual-LED (dual tone) flash
Primary camera optical image stabilization

optical image stabilization

-
Primary camera video dual video

dual-video record

-
Primary camera video hdr

HDR

-
Camera features

Auto HDR, Geo-tagging, face/smile detection, panorama, simultaneous 4K video and 9MP image recording, touch focus

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

105

-
DxOMark video

91

-
DxOMark camera score

100

-

Connectivity
WLAN

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

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

Yes

Yes
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 1.0 reversible connector

Type-C reversible connector
Bluetooth

v5.0

v4.1
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

-
Bluetooth AptX

Yes

-
Infrared

-

Yes
NFC

Yes

-
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

-
BDS

Yes

Yes

Features
Messaging SMS

SMS(threaded view)

SMS(threaded view)
Messaging MMS

MMS

MMS
Messaging Email

Email

Email
Messaging IM

IM

IM
Messaging Push Mail

Push Mail

Push Mail
Java

-

No
Sensors

Iris scanner, SpO2, accelerometer, barometer, compass, fingerprint (rear-mounted), gyro, heart rate, proximity

Fingerprint, accelerometer, compass, gyro, proximity