Realme 15T vs Vivo X21i comparison

Compare Realme 15T
Compare Vivo X21i
key specs
Display6.57-inch6.28-inch
ProcessorMediaTek Dimensity 6400MediaTek Helio P60
Front Camera50-megapixel 24-megapixel
Rear Camera50-megapixel + 2-megapixel 12-megapixel
RAM8GB, 12GB4GB
Storage128GB, 256GB64GB
Battery Capacity7000mAh3245mAh
OSAndroid 15Android 8.1
Resolution1080x2372 pixels1080x2280 pixels
general
BrandRealmeVivo
Model15TX21i
Release dateSeptember 2, 2025May 1, 2018
AI EnabledYes-
Launched in IndiaYes-
Form factorTouchscreenTouchscreen
Thickness7.79-
Weight (g)181.00159.00
IP ratingIP69-
Battery capacity (mAh)70003245
Removable batteryNo-
Fast chargingSuper VOOC-
ColoursFlowing Silver, Silk Blue, Suit TitaniumAurora White, Polar Night, Ruby Red
Dimensions (mm)-154.37 x 74.98 x 6.99
display
Refresh Rate120 Hz-
Resolution StandardFHD+-
Screen size (inches)6.576.28
TouchscreenYesYes
Resolution1080x2372 pixels1080x2280 pixels
hardware
Processorocta-core2GHz octa-core
Processor makeMediaTek Dimensity 6400MediaTek Helio P60 (MT6771)
RAM8GB, 12GB4GB
Internal storage128GB, 256GB64GB
Expandable storageYesYes
Expandable storage typemicroSDmicroSD
Expandable storage up to (GB)2000256
Dedicated microSD slotNo-
camera
Rear camera50-megapixel (f/1.8) + 2-megapixel (f/2.4)12-megapixel
No. of Rear Cameras2-
Rear flashYesDual LED
Front camera50-megapixel (f/2.4)24-megapixel
No. of Front Cameras1-
software
Operating systemAndroid 15Android 8.1
SkinRealme UI 6Funtouch OS 4
connectivity
Wi-FiYesYes
GPSYesYes
BluetoothYes, v 5.30Yes
InfraredYes-
USB OTGYesYes
USB Type-CYes-
HeadphonesType-C-
Number of SIMs22
Active 4G on both SIM cardsYes-
Wi-Fi standards supported-802.11 b/g/n
FM-Yes
sim 1
SIM TypeNano-SIMNano-SIM
GSM/CDMA-GSM
3G-Yes
4G/ LTE-Yes
sim 2
SIM TypeNano-SIMNano-SIM
GSM/CDMA-GSM
3G-Yes
4G/ LTE-Yes
sensors
In-Display Fingerprint SensorYes-
Compass/ MagnetometerYes-
Proximity sensorYesYes
AccelerometerYesYes
Ambient light sensorYesYes
GyroscopeYesYes

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