Oppo K9 Pro vs UMIDIGI A3S

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800

GSM 850, 900, 1800, 1900
3G network

HSDPA 800, 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1x

W-CDMA 850, 900, 1700, 1900, 2100
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 28, 34, 38, 39, 40, 41

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 18(850), 19(850), 20(800), 26(850), 28(700), 38(2600), 40(2300), 41(2500)
5G network

5G band 1, 28, 41, 77, 78 SA/NSA

-
HSDPA speed

42.2 Mbps

-
HSUPA speed

5.76 Mbps

-
LTE speed

LTE-A, 1200 Mbps download, 210 Mbps upload

LTE Cat 4, 150 Mbps download, 51 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Display
Display type

AMOLED

IPS capacitive touchscreen
Physical size

6.43 inches

5.7 inches
Resolution

1080 x 2400 pixels

720 x 1440 pixels
Pixel density

409 ppi

282 ppi
Display colors

16777216

16777216
Protection

Scratch resistant, 2.5D curved glass screen, Asahi Dragontrail Glass

2.5D curved glass screen, Scratch resistant
Multitouch

-

Yes
Display features

120Hz, HDR10, 430 nits (typ), 800 nits (peak)

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Main camera
Camera type

Triple

Dual
Main camera

(wide) , 64 MP, f/1.7 , 80˚ , 26 mm, 1/2.0" , 0.8 µm, 20x digital zoom

16 MP, f/2.0 , 0.26" , 1.132 µm
(ultrawide) , 8 MP, f/2.2 , 119˚

5 MP
(macro) , 2 MP, f/2.4
Primary camera resolution

9280 x 6920 pixels

4608 x 3456 pixels
Primary camera video

4K@30fps, 1080p@30/60/120fps; gyro-EIS

1080p@30fps
Primary camera flash

LED flash

dual LED flash
Camera features

Autofocus, continuous 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, contrast detection autofocus

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, phase detection autofocus

Connectivity
WLAN

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

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 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 2.0

microUSB 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.2

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth HID

-

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

aptX HD

-
NFC

Yes

-
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
Beidou

-

Yes
BDS

Yes

-
QZSS

Yes

-