Product
Realme C21Y
Realme C21Y
Xiaomi Poco M7
Xiaomi Poco M7
Battery
Charging Reverse wired 18W wired
Type 5000 mAh Li-Po 5160 mAh
Body
Build Glass front, plastic back, plastic frame Glass front, glass back, plastic frame
Dimensions 164.5 x 76 x 9.1 mm (6.48 x 2.99 x 0.36 in) 171.9 x 77.8 x 8.2 mm (6.77 x 3.06 x 0.32 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 200 g (7.05 oz) 205.4 g (7.23 oz)
  - Dust and splash resistant
Comms
Bluetooth 5.0, A2DP, LE 5.0, A2DP, LE
NFC No No
Positioning GPS, GLONASS, BDS GPS, GLONASS, GALILEO, BDS, QZSS, NavIC
Radio Unspecified FM radio, recording
USB microUSB 2.0, OTG USB Type-C 2.0
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 1640 pixels (~260 ppi density)
Size 6.5 inches, 102.0 cm2 (~81.6% screen-to-body ratio) 6.88 inches, 112.4 cm2 (~84.0% screen-to-body ratio)
Type IPS LCD, 400 nits (typ) IPS LCD, 120Hz, 450 nits (typ), 600 nits (HBM)
Features
Sensors Fingerprint (rear-mounted), accelerometer, proximity, compass Fingerprint (side-mounted), accelerometer, compass
  - Virtual proximity sensing
Launch
Announced 2021, June 21 2025, March 03
Status Available. Released 2021, July 02 Available. Released 2025, March 07
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, HDR
Single - 50 MP, f/1.8, (wide), 1/2.96", PDAF
Video 1080p@30fps 1080p@30fps
Memory
Card slot microSDXC (dedicated slot) microSDXC (dedicated slot)
Internal 32GB 3GB RAM, 64GB 4GB RAM 128GB 6GB RAM, 128GB 8GB RAM
  eMMC 5.1 -
Misc
Colors Cross Black, Cross Blue Ocean Blue, Satin Black, Mint Green
Models RMX3261, RMX3263 24108PCE2I, MZB0KE1IN
SAR - 0.85 W/kg (head)     0.76 W/kg (body)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 2100 HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands 1, 3, 5, 8, 38, 40, 41 1, 2, 3, 4, 5, 7, 8, 18, 19, 20, 26, 28, 38, 40, 41, 42, 48, 66
5G bands - 1, 2, 3, 5, 7, 8, 20, 26, 28, 38, 40, 41, 48, 66, 77, 78 SA/NSA
Speed HSPA, LTE HSPA, LTE, 5G
Technology GSM / HSPA / LTE GSM / HSPA / LTE / 5G
Platform
Chipset Unisoc T610 (12 nm) Qualcomm SM4450 Snapdragon 4 Gen 2 (4 nm)
CPU Octa-core (2x1.8 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55) Octa-core (2x2.2 GHz Cortex-A78 & 6x1.95 GHz Cortex-A55)
GPU Mali-G52 MP2 Adreno 613
OS Android 10/ Android 11 Android 14, up to 2 major Android upgrades, HyperOS
Selfie camera
Features HDR, panorama -
Single 5 MP, f/2.2, (wide), 1/5.0", 1.12µm 8 MP, f/2.0, (wide)
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes, with stereo speakers