OPPO K13 5G vs Vivo X21 UD comparison

Show Only Differences Highlight Differences	OPPO K13 5G	Vivo X21 UD
key specs
Display	6.70-inch	6.28-inch
Processor	Qualcomm Snapdragon 6 Gen 4	Qualcomm Snapdragon 660
Front Camera	16-megapixel	12-megapixel
Rear Camera	50-megapixel + 2-megapixel	12-megapixel
RAM	8GB	6GB
Storage	128GB, 256GB	128GB
Battery Capacity	7000mAh	3200mAh
OS	Android 15	Android 8.1
Resolution	1080x2400 pixels	1080x2280 pixels
general
Brand	OPPO	Vivo
Model	K13 5G	X21 UD
Release date	April 21, 2025	March 1, 2018
AI Enabled	Yes	-
Launched in India	Yes	-
Form factor	Touchscreen	Touchscreen
Thickness	8.45	-
Weight (g)	208.00	156.20
IP rating	IP65	-
Battery capacity (mAh)	7000	3200
Fast charging	80W Fast Charging	-
Colours	Icy Purple, Prism Black	Ruby Red, Aurora White, Black
Dimensions (mm)	-	154.50 x 74.80 x 7.40
display
Refresh Rate	120 Hz	-
Resolution Standard	FHD+	-
Screen size (inches)	6.70	6.28
Touchscreen	Yes	Yes
Resolution	1080x2400 pixels	1080x2280 pixels
hardware
Processor	octa-core	octa-core
Processor make	Qualcomm Snapdragon 6 Gen 4	Qualcomm Snapdragon 660
RAM	8GB	6GB
Internal storage	128GB, 256GB	128GB
camera
Rear camera	50-megapixel (f/1.85) + 2-megapixel	12-megapixel
No. of Rear Cameras	2	-
Front camera	16-megapixel (f/2.4)	12-megapixel
No. of Front Cameras	1	-
Rear flash	-	LED
software
Operating system	Android 15	Android 8.1
Skin	ColorOS 15	FunTouch 4.0
connectivity
Wi-Fi	Yes	Yes
Wi-Fi standards supported	802.11 a/b/g/n/ac	802.11 a/b/g/n/ac
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	-
USB OTG	-	Yes
Headphones	-	3.5mm
sim 2
SIM Type	Nano-SIM	Micro-SIM
4G/ LTE	Yes	Yes
5G	Yes	-
GSM/CDMA	-	GSM
3G	-	Yes
sensors
In-Display Fingerprint Sensor	Yes	-
Compass/ Magnetometer	Yes	Yes
Proximity sensor	Yes	Yes
Accelerometer	Yes	-
Ambient light sensor	Yes	Yes
Gyroscope	Yes	Yes
sim 1
SIM Type	-	Micro-SIM
GSM/CDMA	-	GSM
3G	-	Yes
4G/ LTE	-	Yes

Popular Mobile Brands