Redmi 15 5G vs Vivo X21 comparison

Compare Redmi 15 5G
Compare Vivo X21
key specs
Display6.90-inch6.28-inch
Front Camera8-megapixel 12-megapixel
Rear Camera50-megapixel 12-megapixel + 5-megapixel
RAM6GB, 8GB6GB
Storage128GB, 256GB128GB
Battery Capacity7000mAh3200mAh
OSAndroid 15Android 8.1
Resolution1080x2340 pixels1080x2280 pixels
Processor-Qualcomm Snapdragon 660
general
BrandRedmiVivo
Model15 5GX21
Release dateAugust 19, 2025March 1, 2018
AI EnabledYes-
Launched in IndiaYesYes
Form factorTouchscreenTouchscreen
Dimensions (mm)168.48 x 80.45 x 8.40154.50 x 74.80 x 7.40
Weight (g)217.00156.20
IP ratingIP64-
Battery capacity (mAh)70003200
Fast charging33W Fast ChargingProprietary
ColoursFrosted White, Midnight Black, Sandy PurpleBlack, Gold
Removable battery-No
display
Refresh Rate144 Hz-
Resolution StandardFHD+-
Screen size (inches)6.906.28
TouchscreenYesYes
Resolution1080x2340 pixels1080x2280 pixels
Pixels per inch (PPI)374-
Aspect ratio-19:9
hardware
Processor makeQualcomm Snapdragon 6s Gen 3Qualcomm Snapdragon 660
RAM6GB, 8GB6GB
Internal storage128GB, 256GB128GB
Processor-2.2GHz octa-core
Expandable storage-Yes
Expandable storage type-microSD
Expandable storage up to (GB)-256
camera
Rear camera50-megapixel (f/1.75)12-megapixel (f/1.8, 1.4-micron) + 5-megapixel (f/2.4)
No. of Rear Cameras2-
Rear flashYesLED
Front camera8-megapixel (f/2.2)12-megapixel (f/2.0)
No. of Front Cameras1-
Rear autofocus-Phase detection autofocus
software
Operating systemAndroid 15Android 8.1
SkinHyperOS 2.0FunTouch 4.0
connectivity
Wi-FiYesYes
GPSYesYes
BluetoothYesYes, v 5.00
InfraredYesNo
USB Type-CYes-
Number of SIMs22
Wi-Fi standards supported-802.11 a/b/g/n/ac
NFC-No
USB OTG-Yes
Micro-USB-Yes
Headphones-3.5mm
FM-No
sensors
Fingerprint sensorYesYes
Compass/ MagnetometerYesYes
Proximity sensorYesYes
AccelerometerYesYes
Ambient light sensor-Yes
Gyroscope-Yes
ratings
Overall NDTV Rating-Read Review
Design Rating-
Display Rating-
Software Rating-
Performance Rating-
Battery Life Rating-
Camera Rating-
Value for Money Rating-
sim 1
SIM Type-Nano-SIM
GSM/CDMA-GSM
3G-Yes
4G/ LTE-Yes
sim 2
SIM Type-Nano-SIM
GSM/CDMA-GSM
3G-Yes
4G/ LTE-Yes

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