Asus Zenfone 4 Pro ZS551KL vs Ulefone Armor X5

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

HSDPA 850, 900, 1700, 1900, 2100

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 17(700), 19(800), 20(800), 28(700), 38(2600), 39(1900), 40(2300), 41(2500) - Global, Taiwan; LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 18(800), 19(800), 20(800), 26(850), 28(700), 29(700), 30(2300), 38(2600), 39(1900), 41(2500) - US, Canada, Brazil; LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 18(800), 19(800), 20(800), 26(850), 28(700), 29(700), 30(2300), 38(2600), 39(1900), 40(2300), 41(2500) - India

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700), 5(850), 7(2600), 8(900), 12(700), 17(700), 19(850), 20(800), 28(700)

42.2 Mbps

-

5.76 Mbps

-

LTE-A, (3CA) Cat12, 600 Mbps download, 150 Mbps upload

-

2017-8

2019-10

2017-10

2019-10

-

Aluminium alloy, reinforced polycarbonate, rubber

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

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

156.9 mm

158 mm

75.6 mm

77.5 mm

7.6 mm

13.85 mm

175 g

235 g

-

Yes, IP68, IP69K

-

Yes, IP68, IP69K

-

Yes

Moonlight white, Pure Black

Black, Orange, Red

AMOLED capacitive touchscreen

IPS capacitive touchscreen

1080 x 1920 pixels

720 x 1440 pixels

401 ppi

293 ppi

Corning Gorilla Glass 5

-

Yes, max 10 fingers

Yes

Quad-core 2.45 GHz Kryo

Quad-core 2.0 GHz Cortex-A53

quad-core 1.9 GHz Kryo

quad-core 1.5 GHz Cortex-A53

Qualcomm MSM8998 Snapdragon 835

MediaTek Helio P23 MT6763V

Adreno 540

Mali-G71 MP2

6 GB

3 GB

64, 128 GB

32 GB

microSD(uses second SIM slot)

microSD, microSDHC, microSDXC

Android 7.1.1 (Nougat)

Android 9.0 Pie

12 MP, f/1.7 , 25 mm, 2x optical zoom

13 MP, f/1.8

16 MP, 50 mm

2 MP

-

4160 x 3120 pixels

2160p@30fps, 1080p@30/60fps, 1080p@120fps, 720p@240fps

1080p@30fps

laser/phase detection autofocus

-

LED flash

dual-LED flash

4-axis optical image stabilization

-

25mm (1/2.55" sensor size, 1.4 µm pixel size), 50mm (1/3.1" sensor size, 1.0 µm pixel size), geo-tagging, touch focus, face detection, HDR, panorama

Autofocus, continuous shooting, digital zoom, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode

8 MP, f/1.9 , 22 mm, 1.4 µm

5 MP, f/2.0

-

2560 x 1920 pixels

1080p

720p@30fps

Yes, dual speakers

Yes

Vibration; MP3, WAV ringtones

-

-

Yes

-

FM Radio

FM radio

-

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

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

-

Yes

Type-C reversible connector

microUSB 2.0

-

Yes

Yes

-

Yes

-

Yes

-

Yes

-

Yes

-

Yes

-

SMS(threaded view)

-

MMS

-

Email

-

IM

-

Push Email

-

No

-

Fingerprint (front-mounted), accelerometer, color spectrum, compass, gyro, proximity

Accelerometer, compass, light, proximity

Li-Ion

Li-Po

3600 mAh

5000 mAh

50% in 32 min

Yes

-

25 h

27 h 30 min

25 h

-

440 h

-

440 h

-

100 USD