Realme P4x 5G vs Vivo X21 UD comparison

Show Only Differences Highlight Differences	Realme P4x 5G	Vivo X21 UD
ratings
Overall NDTV Rating	Read Review	-
Design Rating		-
Display Rating		-
Software Rating		-
Performance Rating		-
Battery Life Rating		-
Camera Rating		-
Value for Money Rating		-
key specs
Display	6.72-inch	6.28-inch
Front Camera	8-megapixel	12-megapixel
Rear Camera	50-megapixel + 2-megapixel	12-megapixel
RAM	6GB, 8GB	6GB
Storage	128GB, 256GB	128GB
Battery Capacity	7000mAh	3200mAh
OS	Android	Android 8.1
Processor	-	Qualcomm Snapdragon 660
Resolution	-	1080x2280 pixels
general
Brand	Realme	Vivo
Model	P4x 5G	X21 UD
Release date	December 4, 2025	March 1, 2018
Launched in India	Yes	-
Thickness	8.39	-
Weight (g)	208.00	156.20
IP rating	IP64	-
Battery capacity (mAh)	7000	3200
Fast charging	45W Fast Charging	-
Wireless charging	No	-
Colours	Matte Silver, Elegant Pink, and Lake Green	Ruby Red, Aurora White, Black
Form factor	-	Touchscreen
Dimensions (mm)	-	154.50 x 74.80 x 7.40
display
Refresh Rate	144 Hz	-
Resolution Standard	HD+	-
Screen size (inches)	6.72	6.28
Touchscreen	Yes	Yes
Resolution	-	1080x2280 pixels
hardware
Processor make	MediaTek Dimensity 7400 Ultra	Qualcomm Snapdragon 660
RAM	6GB, 8GB	6GB
Internal storage	128GB, 256GB	128GB
Processor	-	octa-core
camera
Rear camera	50-megapixel + 2-megapixel	12-megapixel
No. of Rear Cameras	2	-
No. of Front Cameras	1	-
Front camera	8-megapixel	12-megapixel
Rear flash	-	LED
software
Operating system	Android	Android 8.1
Skin	Realme UI 6.0	FunTouch 4.0
connectivity
Wi-Fi	Yes	Yes
Bluetooth	Yes	Yes, v 5.00
USB Type-C	Yes	-
Number of SIMs	2	2
Active 4G on both SIM cards	Yes	-
Wi-Fi standards supported	-	802.11 a/b/g/n/ac
GPS	-	Yes
USB OTG	-	Yes
Headphones	-	3.5mm
sim 1
5G	Yes	-
SIM Type	-	Micro-SIM
GSM/CDMA	-	GSM
3G	-	Yes
4G/ LTE	-	Yes
sim 2
5G	Yes	-
SIM Type	-	Micro-SIM
GSM/CDMA	-	GSM
3G	-	Yes
4G/ LTE	-	Yes
sensors
Compass/ Magnetometer	-	Yes
Proximity sensor	-	Yes
Ambient light sensor	-	Yes
Gyroscope	-	Yes

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