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Model

Compare BLU S91 and Ulefone Armor 21

BLU S91 vs Ulefone Armor 21

BLU S91

Ulefone Armor 21

Ulefone Armor 21

BLU S91

Ulefone Armor 21

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900
3G network

HSDPA 850, 900, 1700, 1900, 2100

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

LTE frequency band 1, 2, 3, 4, 5, 7, 12, 13, 17, 28, 66

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

42.2 Mbps

-
HSUPA speed

5.76 Mbps

-
EV-DO speed

-

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

-

LTE
GPRS

Yes

Yes
EDGE

Yes

Yes

Availability
Oficially announced

2022-06

2023-05
Status

2022-06

2023-05

Design
Build

-

Polycarbonate, TPU, metal
SIM

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

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

164.8 mm

176 mm
Width

76.3 mm

81.6 mm
Thickness

8.9 mm

18.1 mm
Weight

202 g

400 g
Waterproof

-

IP68/IP69K (1.5m and 30 mins)
Dust proof

-

IP68/IP69K
MIL-STD-810H

-

Yes
Colors

Black, Green

Black

Display
Display type

IPS LCD

IPS LCD
Physical size

6.5 inches

6.58 inches
Resolution

720 x 1600 pixels

1080 x 2408 pixels
Pixel density

270 ppi

401 ppi
Display colors

16777216

16777216
Protection

-

Scratch resistant

Hardware
CPU

Octa-core

Octa-core
CPU

Quad-core 2.0 GHz Cortex-A53

Dual-core 2.2 GHz Cortex-A76
CPU(second)

quad-core 1.5 GHz Cortex-A53

Hexa-core 2.0 GHz Cortex-A55
Chipset

-

MediaTek MT8781 Helio G99
GPU

-

Mali-G57 MC2
Internal storage

128 GB

256 GB
Memory RAM

4 GB

8 GB
Memory card

microSD, microSDHC, microSDXC

microSD, microSDHC, microSDXC
Memory card max

256 GB

2 TB

OS
OS

Android 11

Android 13

Main camera
Camera type

Triple

Dual
Main camera

(wide) , 13 MP

(wide) , 64 MP, f/1.9 , 0.8 µm
(macro) , 0.3 MP, f/2.4

(night vision) , 24 MP, f/1.8
(depth) , 0.3 MP, f/2.4
Primary camera resolution

-

9280 x 6180 pixels
Primary camera video

1080p@30fps

-
Primary camera flash

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, macro-mode, phase detection autofocus

Selfie camera
Selfie camera type

-

Single
Selfie camera

13 MP

16 MP, (wide) , f/2.2 , 1.0 µm
Selfie camera resolution

-

4608 x 3456 pixels
Selfie camera features

-

Face unlock, HDR, face detection
Selfie camera video

1080p@30fps

1080p@30fps

Sound
3.5mm jack

Yes

Yes
Loudspeaker

Yes

Yes
Earpiece

Yes

Yes

Multimedia
Radio

FM Radio

Stereo FM radio, RDS, recording

Connectivity
WLAN

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

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

Yes

Yes
WLAN WiFi Direct

Yes

-
WLAN WiFi Dual Band

-

Yes
USB

Type-C 2.0

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.0

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Infrared

-

Yes
NFC

No

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

-

Yes
GALILEO

-

Yes
BDS

-

Yes

Features
Sensors

Accelerometer, compass, fingerprint, gyroscope, proximity

Accelerometer, barometer, compass, fingerprint, gyroscope, proximity

Browser
HTML

HTML5

HTML5

Battery
Battery type

Li-Po

Li-Po
Battery capacity

5000 mAh

9600 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

-

Yes, 33W

Cost
Price

180 USD

240 USD

Tests and performance
Antutu

-

370000 (v9)
Geekbench(single-core)

-

567 (v5.2)
Geekbench(multi-core)

-

1857 (v5.2)

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