UMIDIGI F1 vs vivo X20

Network
2G network

GSM 850, 900, 1800, 1900

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

HSDPA 850, 900, 1700, 1900, 2100

HSDPA 850, 900, 1900, 2100
4G network

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 18(800); LTE-TDD 1900, 2000, 2300, 2500, 2600

LTE frequency band 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
HSPA speed

-

HSPA
LTE speed

LTE, Cat7, 301 Mbps download, 102 Mbps upload

LTE
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Metal

-
SIM

Dual SIM (Nano-SIM/Nano-SIM(microSD))

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

156.9 mm

155.9 mm
Width

74.3 mm

75.2 mm
Thickness

8.8 mm

7.2 mm
Weight

186 g

159 g
Colors

Black, Gold, Red

Black/Gold, Gold, Matte Black, Rose gold

Display
Display type

IPS

Super AMOLED capacitive touchscreen
Physical size

6.3 inches

6.01 inches
Resolution

1080 x 2340 pixels

1080 x 2160 pixels
Pixel density

409 ppi

402 ppi
Display colors

16777216

16777216
Protection

Scratch resistant, 2.5D curved glass screen, LTPS(Low Temperature PolySilicon)

-
Multitouch

Yes

Yes

Main camera
Camera type

Dual

Dual
Main camera

16 MP, f/1.7 , 1/2.8" , 1.12 µm

12 MP, f/1.8
8 MP, 1/4" , 1.12 µm

5 MP
Primary camera resolution

4672 x 3504 pixels

-
Primary camera video

1080p@30fps

1080p@30fps
Primary camera Autofocus

-

autofocus
Primary camera flash

dual-LED flash

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

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

Connectivity
WLAN

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

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

Yes

Yes
WLAN WiFi Direct

Yes

Yes
Wi-Fi display

Yes

-
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C reversible connector

microUSB 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v4.1

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth HID

Yes

-
bluetooth LE

-

Yes
NFC

Yes

-
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

-
Beidou

Yes

-

Features
Messaging SMS

-

SMS(threaded view)
Messaging MMS

-

MMS
Messaging Email

-

Email
Messaging Push Email

-

Push Email
Java

-

No
Sensors

Accelerometer, compass, fingerprint, gyroscope, light, proximity

Fingerprint (rear-mounted), accelerometer, compass, gyro, proximity