Apple Watch Series 3 vs Xiaomi Mi 4i

Apple Watch Series 3

Xiaomi Mi 4i

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900
3G network

HSDPA 850, 900, 2100, 800 - Europe, Australia; HSDPA 850, 1700(AWS), 1900, 800 - USA, LATAM, Canada; HSDPA 2100 - China

HSDPA 850, 1900, 2100
4G network

LTE frequency band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 18(800), 19(800), 20(800), 26(850) - Europe, Australia; LTE frequency band 2(1900), 4(1700/2100), 5(850), 12(700), 13(700), 17(700), 18(800), 19(800), 25(1900), 26(850), 41(2500) - USA, LATAM, Canada; LTE frequency band 1(2100), 3(1800), 39(1900), 40(2300), 41(2500) - China

-
HSPA speed

HSPA

HSPA
LTE speed

LTE

LTE
GPRS

Yes

Yes
EDGE

Yes

Yes

Connectivity
WLAN

Wi-Fi 802.11b, 802.11g, 802.11n

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

-

Yes
WLAN WiFi Direct

-

Yes
WLAN WiFi Dual Band

-

Yes
USB

microUSB 2.0
USB host

-

Yes
Bluetooth

v4.2

v4.1
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

-
NFC

Yes

-
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GPS Navigator

-

Beidou

Features
Messaging SMS

SMS(threaded view)

SMS(threaded view)
Messaging MMS

-

MMS
Messaging Email

Email

Email
Messaging IM

IM

IM
Messaging Push Email

-

Push Mail
Messaging Push Mail

Push Mail

-
Java

No

No
Sensors

Accelerometer, barometer, gyro, heart rate

Accelerometer, compass, gyro, proximity

Main camera
Camera type

-

Photo / Video
Main camera

13 MP
Primary camera resolution

-

4128 x 3096 pixels
Primary camera video

-

1080p@30fps
Primary camera Autofocus

-

autofocus
Primary camera flash

-

dual-LED (dual tone) flash
Camera features

-

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