Product
Realme C21Y
Realme C21Y
Vivo Y04
Vivo Y04
Battery
Charging Reverse wired 15W wired
Type 5000 mAh Li-Ion 5500 mAh
Body
Build Glass front, plastic back, plastic frame Glass front, plastic frame, plastic back
Dimensions 164.5 x 76 x 9.1 mm (6.48 x 2.99 x 0.36 in) 167.3 x 77 x 8.2 mm (6.59 x 3.03 x 0.32 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 200 g (7.05 oz) 199 g (7.02 oz)
  - IP64 dust tight and water resistant (water splashes)MIL-STD-810H compliant** does not guarantee ruggedness or use in extreme conditions
Comms
Bluetooth 5.0, A2DP, LE 5.2, A2DP, LE
NFC No No
Positioning GPS, GLONASS, BDS GPS, GALILEO, GLONASS, BDS, QZSS
Radio Unspecified FM radio
USB microUSB 2.0, OTG USB Type-C 2.0, OTG
WLAN Wi-Fi 802.11 b/g/n Wi-Fi 802.11 a/b/g/n/ac, dual-band
Display
Resolution 720 x 1600 pixels, 20:9 ratio (~270 ppi density) 720 x 1600 pixels, 20:9 ratio (~260 ppi density)
Size 6.5 inches, 102.0 cm2 (~81.6% screen-to-body ratio) 6.74 inches, 109.7 cm2 (~85.1% screen-to-body ratio)
Type IPS LCD, 400 nits (typ) IPS LCD, 90Hz, 570 nits (HBM)
Features
Sensors Fingerprint (rear-mounted), accelerometer, proximity, compass Fingerprint (side-mounted), accelerometer, proximity, compass
Launch
Announced 2021, June 21 2025, February 26
Status Available. Released 2021, July 02 Available. Released 2025, March 11
Main Camera
Dual 13 MP, f/2.2, 26mm (wide), 1/3.06", 1.12µm, PDAF 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) -
Features LED flash, HDR, panorama LED flash, panorama
Single - 13 MP, f/2.2, (wide), PDAF0.08 MP, f/3.0 (auxiliary lens)
Video 1080p@30fps 1080p@30fps
Memory
Card slot microSDXC (dedicated slot) microSDXC (dedicated slot)
Internal 32GB 3GB RAM, 64GB 4GB RAM 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 256GB 4GB RAM
  eMMC 5.1 eMMC 5.1
Misc
Colors Cross Black, Cross Blue Titanium Gold (Titanium Silver), Dark Green (Majestic Green), Violet
Models RMX3261, RMX3263 V2430
SAR - 0.97 W/kg (head)     0.93 W/kg (body)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 2100 HSDPA 850 / 900 / 2100
4G bands 1, 3, 5, 8, 38, 40, 41 1, 3, 5, 7, 8, 20, 28, 38, 40, 41 - International
Speed HSPA, LTE HSPA, LTE
Technology GSM / HSPA / LTE GSM / HSPA / LTE
  - 1, 3, 5, 8, 38, 40, 41 - India
Platform
Chipset Unisoc T610 (12 nm) Unisoc T7225 (12 nm)
CPU Octa-core (2x1.8 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55) Octa-core (2x2.0 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)
GPU Mali-G52 MP2 Mali-G52 MP1
OS Android 10/ Android 11 Android 14, Funtouch 14
Selfie camera
Features HDR, panorama -
Single 5 MP, f/2.2, (wide), 1/5.0", 1.12µm 5 MP, f/2.2, (wide)
Video 1080p@30fps Yes
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes, with stereo speakers