Apple Watch Series 3 Aluminum vs Elephone U2

Apple Watch Series 3 Aluminum

Elephone U2

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, 900, 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

LTE frequency band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 18(800)
HSPA speed

HSPA

-
LTE speed

LTE

LTE, Cat6, 301 Mbps download, 51 Mbps upload
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, 802.11n 5GHz
WLAN WiFi Hotspot

-

Yes
WLAN WiFi Direct

-

Yes
Wi-Fi display

-

Yes
WLAN WiFi Dual Band

-

Yes
USB

Type-C reversible connector
USB On-The-Go

-

Yes
Bluetooth

v4.2

v4.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
NFC

Yes

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes

Features
Messaging SMS

SMS(threaded view)

-
Messaging Email

Email

-
Messaging IM

IM

-
Messaging Push Mail

Push Mail

-
Java

No

-
Sensors

Accelerometer, barometer, gyro, heart rate

Accelerometer, compass, fingerprint, gyroscope, heart rate, light, proximity

Main camera
Camera type

-

Triple
Main camera

12 MP
5 MP
2 MP
Primary camera resolution

-

4032 x 3024 pixels
Primary camera video

-

1080p@30fps
Primary camera flash

-

dual-LED flash
Camera features

-

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