Realme Narzo 100x 5G vs Vivo X21 UD comparison

Show Only Differences Highlight Differences	Realme Narzo 100x 5G	Vivo X21 UD
key specs
Display	6.80-inch	6.28-inch
Front Camera	8-megapixel	12-megapixel
Rear Camera	50-megapixel	12-megapixel
Battery Capacity	8000mAh	3200mAh
OS	Android 16	Android 8.1
Resolution	720x1570 pixels	1080x2280 pixels
Processor	-	Qualcomm Snapdragon 660
RAM	-	6GB
Storage	-	128GB
general
Brand	Realme	Vivo
Model	Narzo 100x 5G	X21 UD
Release date	July 15, 2026	March 1, 2018
AI Enabled	Yes	-
Launched in India	Yes	-
Dimensions (mm)	166.40 x 78.20 x 8.80	154.50 x 74.80 x 7.40
Weight (g)	224.00	156.20
IP rating	IP65	-
Battery capacity (mAh)	8000	3200
Colours	Midnight Black, Flash Orange	Ruby Red, Aurora White, Black
Form factor	-	Touchscreen
display
Refresh Rate	144 Hz	-
Resolution Standard	HD+	-
Screen size (inches)	6.80	6.28
Touchscreen	Yes	Yes
Resolution	720x1570 pixels	1080x2280 pixels
camera
Rear camera	50-megapixel	12-megapixel
No. of Rear Cameras	2	-
Front camera	8-megapixel	12-megapixel
No. of Front Cameras	1	-
Rear flash	-	LED
software
Operating system	Android 16	Android 8.1
Skin	Realme UI 7.0	FunTouch 4.0
connectivity
Wi-Fi	Yes	Yes
GPS	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
USB OTG	-	Yes
Headphones	-	3.5mm
sensors
Face unlock	Yes	-
Fingerprint sensor	Yes	-
Compass/ Magnetometer	Yes	Yes
Proximity sensor	Yes	Yes
Accelerometer	Yes	-
Ambient light sensor	Yes	Yes
Gyroscope	-	Yes
hardware
Processor	-	octa-core
Processor make	-	Qualcomm Snapdragon 660
RAM	-	6GB
Internal storage	-	128GB
sim 1
SIM Type	-	Micro-SIM
GSM/CDMA	-	GSM
3G	-	Yes
4G/ LTE	-	Yes
sim 2
SIM Type	-	Micro-SIM
GSM/CDMA	-	GSM
3G	-	Yes
4G/ LTE	-	Yes

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