Realme C51 vs Oppo A5x
Product
Price
159 USD
159 USD
Status
Available
Available
Brand
Realme Mobiles
Oppo Mobiles
Model No
RMX3830
Oppo A5x
Launch Date
2023, August 01
2025, May 25
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 850 / 900 / 2100
4G bands
1, 3, 5, 8, 38, 40, 41 - Africa, India
1, 3, 5, 7, 8, 20, 28, 38, 40, 41 - Asia
LTE
Speed
HSPA, LTE-A
HSPA, LTE, 5G
5G bands
SA/NSA
Dimensions
167.2 x 76.7 x 8 mm (6.58 x 3.02 x 0.31 in)
165.7 x 76.2 x 8 mm (6.52 x 3.00 x 0.31 in)
Weight
186 g (6.56 oz)
193 g (6.81 oz)
Build
Glass front, plastic frame, plastic back
IP65 dust tight and water resistant (low pressure water jets)
MIL-STD-810H compliant*
* does not guarantee ruggedness or use in extreme conditions
SIM
Dual SIM (Nano-SIM, dual stand-by)
Nano-SIM + Nano-SIM
Colors
Mint Green, Carbon Black
Tranquil Lake Green, Laser White
Type
IPS LCD, 90Hz, 560 nits (peak)
IPS LCD, 120Hz, 1000 nits (HBM)
Size
6.74 inches, 109.7 cm2 (~85.5% screen-to-body ratio)
6.67 inches, 107.2 cm2 (~84.9% screen-to-body ratio)
Resolution
720 x 1600 pixels, 20:9 ratio (~260 ppi densit
720 x 1604 pixels, 20:9 ratio (~264 ppi density)
OS
Android 13, Realme UI T
Android 15, ColorOS 15
Chipset
Unisoc Tiger T612 (12 nm)
Mediatek Dimensity 6300 (6 nm)
CPU
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)
Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU
Mali-G57
Mali-G57 MC2
RAM
4GB
4GB
Storage
64GB/128GB
еMMC 5.1
128GB
UFS 2.2
Card Slot
microSDXC (dedicated slot)
microSDXC
Lens 1
50 MP, f/1.8, 27mm (wide), 1/2.76", 0.64µm, PDAF
32 MP, f/1.9, (wide), AF
Lens 2
0.08 MP, f/3.0, (depth)
Features
LED flash, HDR, panorama
LED flash, HDR, panorama
Video
1080p@30fps
Yes
Lens 1
5 MP, f/2.2, 28mm (wide), 1/5", 1.12µm
5 MP, f/2.2, (wide)
Features
HDR
Video
720p@30fps
Yes
Capacity
Li-Po 5000 mAh, non-removable
6000 mAh
Charging
33W wired, 0-50% in 28 min (advertised)
45W wired, 33W PPS, 13.5W PD, 50% in 37 min
Sensors
Fingerprint (side-mounted), accelerometer, proximity, compass
Fingerprint (side-mounted), accelerometer, proximity, compass
Loudspeaker
Yes
Yes
3.5mm jack
Yes
Yes
WLAN
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
5.0, A2DP, LE
5.1, A2DP, LE
GPS
GPS, GLONASS, GALILEO
GPS, GALILEO, GLONASS, BDS, QZSS
NFC
Yes, 360˚ (market/region dependent)
USB
USB Type-C 2.0, OTG
USB Type-C 2.0, OTG