Realme C51 vs Xiaomi Redmi 15
Product
Price
159 USD
159 USD
Status
Available
Available
Brand
Realme Mobiles
Xiaomi Mobiles
Model No
RMX3830
25057RN09E
Launch Date
2023, August 01
2025, August 01
Technology
GSM / HSPA / LTE
GSM / HSPA / LTE / 5G
2G bands
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
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 - Africa, India
1, 3, 5, 7, 8, 20, 28, 38, 40, 41 - Asia
1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 26, 28, 32, 38, 40, 41, 42, 48, 66, 71
Speed
HSPA, LTE-A
HSPA, LTE, 5G
5G bands
1, 2, 3, 5, 7, 8, 12, 20, 26, 28, 38, 40, 41, 48, 66, 77, 78, 71 SA/NSA
Dimensions
167.2 x 76.7 x 8 mm (6.58 x 3.02 x 0.31 in)
169.5 x 80.5 x 8.4 mm (6.67 x 3.17 x 0.33 in)
Weight
186 g (6.56 oz)
217 g (7.65 oz)
Build
Glass front, plastic frame, plastic back
Corning Gorilla Glass 3, Mohs level 6
IP64 dust tight and water resistant (water splashes)
SIM
Dual SIM (Nano-SIM, dual stand-by)
Nano-SIM + Nano-SIM
Colors
Mint Green, Carbon Black
Midnight Black, Titan Gray, Ripple Green
Type
IPS LCD, 90Hz, 560 nits (peak)
IPS LCD, 144Hz, 600 nits (typ), 700 nits (HBM), 850 nits (peak)
Size
6.74 inches, 109.7 cm2 (~85.5% screen-to-body ratio)
6.9 inches, 116.9 cm2 (~85.7% screen-to-body ratio)
Resolution
720 x 1600 pixels, 20:9 ratio (~260 ppi densit
1080 x 2340 pixels, 19.5:9 ratio (~374 ppi density)
OS
Android 13, Realme UI T
Android 15, HyperOS 2.2
Chipset
Unisoc Tiger T612 (12 nm)
Qualcomm SM6375 Snapdragon 6s Gen 3 (6 nm)
CPU
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)
Octa-core (2x2.3 GHz Cortex-A78 & 6x2.0 GHz Cortex-A55)
GPU
Mali-G57
Adreno 619
RAM
4GB
4GB/6GB/8GB
Storage
64GB/128GB
еMMC 5.1
128GB/256GB
UFS 2.2
Card Slot
microSDXC (dedicated slot)
microSDXC (uses shared SIM slot)
Lens 1
50 MP, f/1.8, 27mm (wide), 1/2.76", 0.64µm, PDAF
50 MP, f/1.8, (wide), 1/2.88" 0.61μm, PDAF
Lens 2
0.08 MP, f/3.0, (depth)
Auxiliary lens
Features
LED flash, HDR, panorama
LED flash, HDR
Video
1080p@30fps
1080p@30fps
Lens 1
5 MP, f/2.2, 28mm (wide), 1/5", 1.12µm
8 MP, f/2.0, (wide)
Features
HDR
HDR
Video
720p@30fps
1080p@30fps
Capacity
Li-Po 5000 mAh, non-removable
7000 mAh
Charging
33W wired, 0-50% in 28 min (advertised)
33W wired, PD 2.0, PPS, QC3
18W reverse wired
Sensors
Fingerprint (side-mounted), accelerometer, proximity, compass
Fingerprint (side-mounted), accelerometer, compass
Virtual proximity sensing
Circle to Search
Loudspeaker
Yes
Yes
3.5mm jack
Yes
No
24-bit/192kHz Hi-Res audio
WLAN
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth
5.0, A2DP, LE
5.1, A2DP, LE, aptX
GPS
GPS, GLONASS, GALILEO
GPS, GLONASS, GALILEO, BDS
NFC
Yes, 360˚ (market/region dependent)
Yes (market/region dependent)
USB
USB Type-C 2.0, OTG
USB Type-C 2.0, OTG