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realme C83 5G vs vivo Y21 5G

₹1,000 apart. Here is what actually separates them.

realme realme C83 5G From ₹19,999
vivo Y21 5G From ₹20,999
The short version

Which one should you buy?

The realme C83 5G starts ₹1,000 lower: ₹19,999 against ₹20,999 for the Y21 5G.

  • The realme C83 5G has the bigger battery: 7,000 mAh against 6,500 mAh. The Y21 5G charges faster, though: 44W against 15W.
  • The screens are a split decision: the realme C83 5G is smoother (144Hz against 120Hz), the Y21 5G is brighter (1,200 nits against 900).
  • The Y21 5G is better sealed against dust and water: IP65 against IP64.
Which to buy

Get the realme C83 5G for the lower price, the bigger battery and the smoother screen. Get the Y21 5G for faster charging, the brighter screen and better water protection.

Side by side

Every spec, lined up

Better on paper

Spec score

Specrealme C83 5GY21 5G
Overall 5.9 out of 10 Average 6.1 out of 10 Good (better)
Performance 5.4 out of 10 5.4 out of 10
Display 6.6 out of 10 6.6 out of 10
Rear camera 4.5 out of 10 5 out of 10 (better)
Front camera 3.7 out of 10 3.7 out of 10
Battery 7.5 out of 10 7.8 out of 10 (better)
Build 6.6 out of 10 6.9 out of 10 (better)

Display

Specrealme C83 5GY21 5G
Size 6.8 inches 6.74 inches
Panel LCD LCD
Resolution 1570 x 720 (HD+) 1600 x 720 (HD+) (better)
Refresh rate 144Hz (better) 120Hz
Peak brightness 900 nits 1,200 nits (better)

Performance

Specrealme C83 5GY21 5G
Chipset MediaTek Dimensity 6300 Dimensity 6300
CPU Octa-core Octa-core, up to 2.4GHz
GPU Mali-G57 MC2 Not listed
RAM 4GB, 6GB 4GB, 6GB
Storage 64GB, 128GB 64GB, 128GB
Software realme UI 7, Android 16 OriginOS 6, Android 16

Camera

Specrealme C83 5GY21 5G
Rear cameras 13MP main 50MP main (f/1.8) + 0.08MP auxiliary (f/3.0)
Front camera 5MP 5MP (f/2.2)
Video 1080p at 30fps (rear), 1080p at 30fps (front) Not listed

Battery

Specrealme C83 5GY21 5G
Battery 7,000 mAh (better) 6,500 mAh
Wired charging 15W 44W (better)

Build and connectivity

Specrealme C83 5GY21 5G
Network 5G, 4G LTE 5G, 4G
SIM Dual nano SIM Dual nano SIM (hybrid microSD slot)
Wi-Fi and Bluetooth Wi-Fi 5, Bluetooth 5.3 Wi-Fi (2.4GHz, 5GHz), Bluetooth 5.4
NFC No No
Dust and water IP64 IP65 (better)
Weight 212 g 209 g (better)
Thickness 8.45 mm 8.39 mm (better)
Colours Blooming Purple, Sprouting Green Champagne Gold, Midnight Blue

Availability

Specrealme C83 5GY21 5G
Launch in India 7 Mar 2026 25 Mar 2026
Status On sale On sale
Price in India

Versions and prices

realme C83 5G
  • 4GB + 64GB₹19,999
  • 4GB + 128GB₹23,999
  • 6GB + 128GB₹26,999
Y21 5G
  • 4GB + 64GB₹20,999
  • 4GB + 128GB₹23,999
  • 6GB + 128GB₹27,999

Prices in India as we last checked them. Sales and bank offers change them often, so check before you buy.

Quick answers

realme C83 5G vs Y21 5G, answered

In India, the realme C83 5G starts at ₹19,999 and the vivo Y21 5G starts at ₹20,999.

Read moreRead less

Which is cheaper, the realme C83 5G or the Y21 5G?

The realme C83 5G, by ₹1,000. Starting prices: ₹19,999 for the realme C83 5G, ₹20,999 for the Y21 5G. The realme C83 5G comes in 3 versions, up to ₹26,999. The Y21 5G comes in 3 versions, up to ₹27,999.

Which has the bigger battery, the realme C83 5G or the Y21 5G?

The realme C83 5G, with 7,000 mAh to 6,500 mAh. For charging, the Y21 5G is quicker: 44W to 15W. Battery life also depends on the chip and the software, so treat these as a starting point.

Which has the better display?

It is a split: the realme C83 5G's screen is smoother (144Hz to 120Hz), the Y21 5G's is brighter (1,200 to 900 nits). The realme C83 5G has a 6.8-inch LCD at 144Hz, the Y21 5G a 6.74-inch LCD at 120Hz.

Which has the better camera?

The main cameras are 13MP main on the realme C83 5G and 50MP main (f/1.8) on the Y21 5G. A spec sheet can't show how the photos look, so read a review before you decide on the camera alone.

Which processors do they use?

The realme C83 5G runs the MediaTek Dimensity 6300, the Y21 5G the Dimensity 6300.

Which is better protected against water?

The Y21 5G, rated IP65 to the realme C83 5G's IP64. Still, no phone is fully waterproof, so keep them out of the pool.

Which is lighter?

They weigh about the same: 212 g and 209 g.