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OPPO Reno 16 vs Vivo X21 UD comparison

 Sponsored Compare OPPO Reno 16
OPPO Reno 16
Compare Vivo X21 UD
Vivo X21 UD
key specs
Display6.32-inch6.28-inch
ProcessorQualcomm Snapdragon 7 Gen 4Qualcomm Snapdragon 660
Front Camera50-megapixel 12-megapixel
Rear Camera50-megapixel + 50-megapixel + 50-megapixel 12-megapixel
RAM8GB6GB
Storage256GB128GB
Battery Capacity6,700mAh3200mAh
OSAndroid 16Android 8.1
Resolution1216x2640 pixels1080x2280 pixels
general
BrandOPPOVivo
ModelReno 16X21 UD
Release dateJuly 2, 2026March 1, 2018
AI EnabledYes-
Launched in IndiaYes-
Form factorTouchscreenTouchscreen
Body typeMetal-
Dimensions (mm)151.21 x 72.42 x 8.36154.50 x 74.80 x 7.40
Weight (g)193.00156.20
IP ratingIP69K-
Battery capacity (mAh)6,7003200
Removable batteryNo-
Fast charging80W Fast Charging-
Wireless chargingNo-
ColoursStarry White, Stellar Purple, and Twilight VioletRuby Red, Aurora White, Black
display
Refresh Rate120 Hz-
Resolution Standard1.5K-
Screen size (inches)6.326.28
TouchscreenYesYes
Resolution1216x2640 pixels1080x2280 pixels
Pixels per inch (PPI)460-
hardware
Processorocta-coreocta-core
Processor makeQualcomm Snapdragon 7 Gen 4Qualcomm Snapdragon 660
RAM8GB6GB
Internal storage256GB128GB
Expandable storageNo-
camera
Rear camera50-megapixel (f/1.8) + 50-megapixel (f/2.0) + 50-megapixel (f/2.8)12-megapixel
No. of Rear Cameras3-
Rear autofocusYes-
Rear flashYesLED
Front camera50-megapixel (f/2.0)12-megapixel
No. of Front Cameras1-
Pop-Up CameraNo-
Front autofocusYes-
Front flashNo-
software
Operating systemAndroid 16Android 8.1
SkinColorOS 16FunTouch 4.0
connectivity
Wi-FiYesYes
GPSYesYes
BluetoothYes, v 5.40Yes, v 5.00
USB Type-CYes-
HeadphonesType-C3.5mm
Number of SIMs22
Active 4G on both SIM cardsYes-
Wi-Fi standards supported-802.11 a/b/g/n/ac
USB OTG-Yes
sim 1
SIM TypeNano-SIMMicro-SIM
GSM/CDMAGSM + CDMAGSM
4G/ LTEYesYes
5GYes-
3G-Yes
sim 2
SIM TypeNano-SIMMicro-SIM
GSM/CDMAGSM + CDMAGSM
4G/ LTEYesYes
5GYes-
3G-Yes
sensors
Face unlockYes-
In-Display Fingerprint SensorYes-
Compass/ MagnetometerYesYes
Proximity sensorYesYes
AccelerometerYes-
Ambient light sensorYesYes
GyroscopeYesYes
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