UMIDIGI A11s vs vivo S18

Network
2G network

GSM 850, 900, 1800, 1900

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

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

HSDPA 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1x
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 66

LTE frequency band 1, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41
5G network

-

5G band 1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA
HSDPA speed

21.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

11.52 Mbps
EV-DO speed

-

EV-DO Rev.A 3.1 Mbps download, 1.8 Mbps upload
LTE speed

LTE, Cat6, 301 Mbps download, 51 Mbps upload

LTE-A
GPRS

Yes

Yes
EDGE

Yes

Yes

Display
Display type

IPS TFT

AMOLED
Physical size

6.53 inches

6.78 inches
Resolution

720 x 1600 pixels

1260 x 2800 pixels
Pixel density

269 ppi

453 ppi
Display colors

16777216

1073741824
Protection

Scratch resistant, 2.5D curved glass screen

Scratch resistant, 3D curved glass screen
Display features

-

120Hz, 2800 nits (peak)

Main camera
Camera type

Triple

Dual
Main camera

(standard) , 16 MP, f/2.0

(wide) , 50 MP, f/1.9 , 1/1.55" , 1.0 µm
(ultrawide) , 8 MP, 120˚

(ultrawide) , 8 MP, f/2.2
(macro) , 5 MP, f/2.4 , 25 mm
Primary camera resolution

4608 x 3456 pixels

8120 x 6180 pixels
Primary camera video

1080p@30fps

4K@30fps, 1080p@30fps
Primary camera flash

dual-LED flash

Ring-LED flash
Camera features

Autofocus, continuous shooting, digital zoom, digital image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, macro-mode, phase detection autofocus, super night mode

Autofocus, continuous shooting, digital zoom, optical 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, macro-mode, phase detection autofocus

Selfie camera
Selfie camera type

Single

Single
Selfie camera

8 MP, f/2.2

50 MP, f/2.0 , (wide) , 22 mm
Selfie camera resolution

3264 x 2448 pixels

8192 x 6144 pixels
Selfie camera features

Face unlock

Face unlock, HDR, face detection, autofocus
Selfie camera video

1080p@30fps

1080p@30fps

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz, 802.11ac, 802.11ax
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 2.0

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.0

v5.4
Bluetooth A2DP

Yes

Yes
bluetooth HID

Yes

-
bluetooth LE

-

Yes
Bluetooth AptX

-

aptX HD, aptX Adaptive, aptX Lossless
NFC

-

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes
QZSS

-

Yes

Features
Sensors

Accelerometer, compass, fingerprint, gyroscope, light, infrared thermometer 2.0, proximity

Accelerometer, color spectrum, compass, fingerprint, gyroscope, proximity