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iQOO U3x vs Poco M4 Pro 5G

Vivo iQOO U3x vs Xiaomi Poco M4 Pro 5G

What iQOO U3x does better (4) and where Poco M4 Pro 5G wins (12) — every spec side by side.

Vivo · 2021iQOO U3x

6.0Score

4 advantages≈ $170

Xiaomi · 2021Poco M4 Pro 5G

6.1Score

12 advantages≈ $160

Higher score

5.5Display4.8

4.2Camera6.6

4.6Battery6.0

5.8Features6.5

Dimensions

Size comparison

iQOO U3xPoco M4 Pro 5G

	iQOO U3x	Poco M4 Pro 5G	Difference
Height	164.2 mm	163.6 mm	+0.6 mm
Width	75.4 mm	75.8 mm	−0.4 mm
Thickness	8.4 mm	8.8 mm	−0.4 mm
Weight	186 g	195 g	−10 g

Drawn to the same scale from the official dimensions (front and side).

Why is iQOO U3x better than Poco M4 Pro 5G?

Max video4K vs 1080p
Weight186 g vs 195 g+5%
Wi-Fi standardWi-Fi 6 vs Wi-Fi 5+20%
Thickness8.4 mm vs 8.8 mm+5%

Why is Poco M4 Pro 5G better than iQOO U3x?

Main camera13 MP vs 50 MP3.8×
Wired charging18 W vs 33 W+83%
Storage (max)128 GB vs 256 GB2×
NFCNo · iQOO U3x: Yes
Stereo speakersNo · iQOO U3x: Yes
Memory card slotNo · iQOO U3x: Yes
Rear cameras1 vs 22×
Ultra-wide cameraNo · iQOO U3x: Yes
Selfie camera8 MP vs 16 MP2×
CPU frequency2 GHz vs 2.4 GHz+20%
Process8 nm vs 6 nm+33%
Main camera aperturef/2.2 vs f/1.8+22%

Specifications

Side by side

Only differences	Vivo iQOO U3x≈ $1706.0	Xiaomi Poco M4 Pro 5G≈ $1606.1
Design
Weight	186 g	195 g
Thickness	8.4 mm	8.8 mm
Height	164.2 mm	163.6 mm
Width	75.4 mm	75.8 mm
Frame	—	Plastic
Back	—	Plastic
Ingress protection	—	IP53
Water resistance (IPx)	—	IPx3
Glass protection	—	Corning Gorilla Glass 3
Colours	Gray, Aurora	Poco Yellow, Power Black, Cool Blue
Display
Screen size	6.6″	6.6″
Panel	IPS LCD	IPS LCD
OLED panel	No	No
Resolution (width)	1,080 px	1,080 px
Resolution (height)	2,408 px	2,400 px
Pixel density	401 ppi	399 ppi
Refresh rate	90 Hz	90 Hz
Peak brightness	—	450 nits
Measured brightness	—	510 nits
Screen-to-body ratio	84.2%	84.8%
Performance
Chipset	Qualcomm SM4350 Snapdragon 480 5G	Mediatek Dimensity 810
Chip maker	Qualcomm	MediaTek
Process	8 nm	6 nm
CPU cores	8	8
CPU frequency	2 GHz	2.4 GHz
GPU	Adreno 619	Mali-G57 MC2
AnTuTu score	—	296,721
Geekbench 6 (multi-core)	—	1,797
3DMark Wild Life Extreme	—	360
Memory
RAM	8 GB	8 GB
Storage (max)	128 GB	256 GB
Storage (base)	64 GB	64 GB
Storage type	UFS 2.1	UFS 2.2
Memory card slot	No	Yes
Camera
Main camera	13 MP	50 MP
Main camera aperture	f/2.2	f/1.8
Main sensor size	—	1/2.76"
Rear cameras	1	2
Optical stabilisation	No	No
Ultra-wide camera	No	Yes
Telephoto camera	No	No
Max video	4K	1080p
4K video frame rate	30 fps	—
Selfie camera	8 MP	16 MP
4K selfie video	No	No
Battery
Battery capacity	5,000 mAh	5,000 mAh
Battery type	—	Li-Po
Wired charging	18 W	33 W
Charged in 30 min	—	51%
Wireless charging	No	No
Connectivity
5G	Yes	Yes
eSIM	No	No
Dual SIM	Yes	Yes
Wi-Fi standard	Wi-Fi 6	Wi-Fi 5
Bluetooth	5.1	5.1
NFC	No	Yes
USB	USB Type-C 2.0	USB Type-C 2.0
USB version	2	2
Infrared port	—	Yes
Satellite navigation	GLONASS, GALILEO, BDS	GLONASS, GALILEO, BDS
Features
Stereo speakers	No	Yes
3.5 mm headphone jack	Yes	Yes
Loudspeaker loudness	—	-24.9 LUFS
Fingerprint sensor	Side	Side
Sensors	Fingerprint (side-mounted), accelerometer, proximity, compass	Fingerprint (side-mounted), accelerometer, gyro, compass
SAR (head)	—	0.59 W/kg
Software
OS at launch	Android 11	Android 11
Platform	Android	Android
Interface	OriginOS 1.0 for iQOO	MIUI 13