Screen size
C216.5"
C83Winner: 6.8"+4.4%
Quick verdict
C83 leads the measured specs 13-3.
Measured wins
C21
3
spec wins
Ties
7
equal specs
C83
13
spec wins
Overall winner
Screen size
Technology
C21
GSM / HSPA / LTE
C83
GSM / HSPA / LTE / 5G
2G bands
C21
GSM 850 / 900 / 1800 / 1900
C83
GSM 850 / 900 / 1800 / 1900
3G bands
C21
HSDPA 850 / 900 / 2100
C83
HSDPA 850 / 900 / 2100
4G bands
C21
1, 3, 5, 7, 8, 20, 28, 38, 40, 41 - International, 1, 3, 5, 8, 38, 40, 41 - India
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
equal specsFront camera
equal specsBattery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
equal specs5G support
NFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
C83
1, 3, 5, 8, 28, 40, 41
Speed
C21
HSPA, LTE
C83
HSPA, LTE, 5G
5G bands
C21
-
C83
1, 3, 5, 8, 28, 40, 41, 77, 78 SA/NSA
Announced
C21
2021, March 05
C83
2026, March 06
Status
C21
Available. Released 2021, March 05
C83
Available. Released 2026, March 07
Dimensions
C21
165.2 x 76.4 x 8.9 mm (6.50 x 3.01 x 0.35 in)
C83
166.3 x 78.1 x 8.4 mm (6.55 x 3.07 x 0.33 in)
Weight
C21
190 g (6.70 oz)
C83
212 g (7.48 oz)
Build
C21
Glass front, plastic back, plastic frame
C83
Glass front, plastic frame, plastic back
SIM
C21
Nano-SIM + Nano-SIM
C83
Nano-SIM + Nano-SIM
Other
C21
-
C83
IP64 dust tight and water resistant (water splashes) MIL-STD-810H compliant* * does not guarantee ruggedness or use in extreme conditions
Type
C21
IPS LCD, 400 nits (typ)
C83
IPS LCD, 144Hz, 900 nits (peak)
Size
C21
6.5 inches, 102.0 cm2 (~80.8% screen-to-body ratio)
C83
6.8 inches, 113.0 cm2 (~87.0% screen-to-body ratio)
Resolution
C21
720 x 1600 pixels, 20:9 ratio (~270 ppi density)
C83
720 x 1570 pixels, 19.5:9 ratio (~254 ppi density)
OS
C21
Android 10, Realme UI
C83
Android 16, Realme UI 7.0
Chipset
C21
Mediatek MT6765G Helio G35 (12 nm)
C83
Mediatek Dimensity 6300 (6 nm)
CPU
C21
Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53)
C83
Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU
C21
PowerVR GE8320
C83
Mali-G57 MC2
Card slot
C21
microSDXC (dedicated slot)
C83
microSDXC (uses shared SIM slot)
Internal
C21
32GB 3GB RAM, 64GB 4GB RAM
C83
64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM
Other
C21
eMMC 5.1
C83
eMMC 5.1
Dual
C21
13 MP, f/2.2, 26mm (wide), 1/3.06", 1.12µm, PDAF 2 MP (macro) Auxiliary lens
C83
-
Features
C21
LED flash, HDR, panorama
C83
LED flash, HDR, panorama
Video
C21
1080p@30fps
C83
1080p@30fps
Single
C21
-
C83
13 MP, f/2.2, (wide)
Single
C21
5 MP, f/2.2, (wide), 1/5.0", 1.12µm
C83
5 MP, f/2.2, (wide)
Features
C21
HDR, panorama
C83
-
Video
C21
1080p@30fps
C83
1080p@30fps
Loudspeaker
C21
Yes
C83
Yes, with stereo speakers
3.5mm jack
C21
Yes
C83
Yes
Other
C21
-
C83
24-bit/192kHz Hi-Res audio
WLAN
C21
Wi-Fi 802.11 b/g/n
C83
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
C21
5.0, A2DP, LE
C83
5.3, A2DP, LE
Positioning
C21
GPS, GLONASS, BDS
C83
GPS, GALILEO, GLONASS, QZSS, BDS
NFC
C21
No
C83
No
Radio
C21
FM radio
C83
No
USB
C21
microUSB 2.0, OTG
C83
USB Type-C 2.0, OTG
Sensors
C21
Fingerprint (rear-mounted), accelerometer, proximity, compass
C83
Accelerometer, gyro, proximity, compass
Type
C21
5000 mAh
C83
Si/C Li-Ion 7000 mAh
Charging
C21
10W wired Reverse wired
C83
15W wired Reverse wired Bypass charging
Colors
C21
Cross Black, Cross Blue
C83
Blooming Purple, Sprouting Green
Models
C21
RMX3201
C83
-
Price
C21
About 410 EUR
C83
About 130 EUR