BLU G51S vs OnePlus 9

Network
2G network

GSM 850, 900, 1800, 1900

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

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

HSDPA 800, 850, 900, 1700(AWS), 1800, 1900, 2100
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 12, 17, 28

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 66 - EU; 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 30, 32, 38, 39, 40, 41, 46, 48, 66, 71 - North America; 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 34, 38, 39, 40, 41, 46 - IN; 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 34, 38, 39, 40, 41 - China
5G network

-

5G band 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 78 SA/NSA - EU; 1, 2, 3, 5, 7, 8, 20, 25, 28, 38, 40, 41, 48, 66, 71, 77, 78 SA/NSA - North America; 41, 78 SA/NSA - IN; 1, 3, 28, 41, 78, 79 SA/NSA - China
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
EV-DO speed

-

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

LTE, 301 Mbps download, 102 Mbps upload

LTE-A (5CA), Cat20, 2000 Mbps download, 200 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

-

Glass front (Gorilla Glass), glass back (Gorilla Glass), plastic frame
SIM

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

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

162.4 mm

160 mm
Width

77.5 mm

74.2 / 73.9 (EU, North America/IN, China) mm
Thickness

9 mm

8.7 / 8.1 (EU, North America/IN, China) mm
Weight

185 g

192 / 183 (EU, North America/IN, China) g
Waterproof

-

IP68
Dust proof

-

IP68
Colors

Blue, Bronze, Green, Red

Black, Sky, Winter Mist

Display
Display type

IPS LCD

Fluid AMOLED
Physical size

6.4 inches

6.55 inches
Resolution

720 x 1560 pixels

1080 x 2400 pixels
Pixel density

268 ppi

402 ppi
Display colors

16777216

16777216
Protection

2.5D curved glass screen

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass
Display features

-

Always-on display, 120Hz, HDR10+, 1100 nits (peak)

Main camera
Camera type

Dual

Triple
Main camera

13 MP

48 MP, (wide) , f/1.8 , 23 mm, 1/1.43" , 1.12 µm
0.3 MP

50 MP, (ultrawide) , f/2.2 , 14 mm, 1/1.56" , 1.0 µm
(depth) , 2 MP, f/2.4
Primary camera resolution

4160 x 3120 pixels

8000 x 6000 pixels
Primary camera video

1080p@30fps

8K@30fps, 4K@30/60fps, 1080p@30/60/240fps, Auto HDR, gyro-EIS
Primary camera flash

LED 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

Autofocus, continuous shooting, digital 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, contrast detection autofocus, Hasselblad Pro mode, dual native ISO, 2.2 OCL

Connectivity
WLAN

Wi-Fi 802.11b, 802.11g, 802.11n

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
WLAN DLNA

-

Yes
USB

Type-C 2.0

Type-C 3.1
USB On-The-Go

-

Yes
Bluetooth

v4.2

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

-

aptX HD
NFC

No

Yes
GPS

Yes, with A-GPS

Yes, with dual-band A-GPS
GLONASS

-

Yes
GALILEO

-

Yes
BDS

-

Yes
SBAS

-

Yes