When the Realme C12 was launched alongside the C15 last year, the two smartphones looked very similar on paper and yet commanded very different prices. In 2021, the manufacturer has brought down the prices of both smartphones' successors. The Realme C25 (Review) has a faster MediaTek Helio G70 processor, while the Realme C12's successor, the C21, now starts at an entry-level price of Rs. 7,999.

Read complete Realme C21 Review

Realme C21 Summary

The Realme C21 is a typical low-end budget smartphone that could serve as a first smartphone for many. Given its entry-level pricing, it makes for a great basic smartphone for calling, messaging, or even for remote learning. Users going in for the Realme C21 should not expect much from it in terms of power and performance. With that in mind, the main focus of the Realme C21 is to be able to run apps (like WhatsApp, Facebook etc.) and offer good battery life. As expected, the C21 does a decent job of running apps and offers a usable software experience with a few hiccups. Battery life is quite solid and because it’s a bit lower in capacity than the 6,000mAh battery in Realme C25, it also charges quicker.

Realme C21 (3GB RAM, 32GB) - Cross Black

₹ 6,999

Buy

Realme C21 price in India starts from ₹ 6,999. The lowest price of Realme C21 is ₹ 6,999 at Flipkart on 16th September 2025.

Price too high? Subscribe to our price drop alert Get Price Drop Alert

Available Variants

3GB RAM

32GB STORAGE

Realme C21 (3GB,32GB)

4GB RAM

64GB STORAGE

Realme C21 (4GB,64GB)

Realme C21 Full Specifications

General

Brand	Realme
Model	C21
Price in India	₹6,999
Release date	8th April 2021
Launched in India	Yes
Dimensions (mm)	165.20 x 76.40 x 8.90
Weight (g)	190.00
Battery capacity (mAh)	5000
Colours	Cross Black, Cross Blue

Display

Screen size (inches)	6.50
Touchscreen	Yes
Resolution	720x1600 pixels

Hardware

Processor	octa-core
Processor make	MediaTek Helio G35
RAM	3GB, 4GB
Internal storage	32GB, 64GB
Expandable storage	Yes
Expandable storage type	microSD
Expandable storage up to (GB)	256
Dedicated microSD slot	Yes

Camera

Rear camera	13-megapixel (f/2.2) + 2-megapixel (f/2.4) + 2-megapixel (f/2.4)
No. of Rear Cameras	3
Front camera	5-megapixel (f/2.2)
No. of Front Cameras	1

Software

Operating system	Android 10
Skin	Realme UI

Connectivity

Wi-Fi	Yes
Wi-Fi standards supported	802.11 b/g/n
GPS	Yes
Bluetooth	Yes, v 5.00
Micro-USB	Yes
Headphones	3.5mm
Number of SIMs	2
SIM 1
SIM Type	Nano-SIM
GSM/CDMA	GSM
3G	Yes
4G/ LTE	Yes
Supports 4G in India (Band 40)	Yes
SIM 2
SIM Type	Nano-SIM
GSM/CDMA	GSM
3G	Yes
4G/ LTE	Yes
Supports 4G in India (Band 40)	Yes

Sensors

Fingerprint sensor	Yes
Compass/ Magnetometer	Yes
Proximity sensor	Yes
Accelerometer	Yes
Ambient light sensor	Yes

! Error or missing information? Please let us know

Realme C21 Comparisons

Realme C21 Competitors

Poco C3

₹ 5,900

Compare

Motorola Moto E7 Power

₹ 6,999

Compare

Redmi A4 5G

₹ 8,298

Compare

Tecno Spark Go (2023)

₹ 6,759

Compare

Karbonn Aura Note 4G

₹ 6,000

Compare

Micromax Bharat 5 Infinity Edition

Compare

Compare

Compare

Compare Realme C21 With »

Realme C21 User Review and Ratings

4.4★ 3,989 ratings &
3,989 reviews

5 ★

2,556
4 ★

826
3 ★

312
2 ★

69
1 ★

226

Write Your Review

Displaying 1-5 of 3,989 reviews

Sort By:

Great product

Sakil Mollick (Apr 16, 2021) on Flipkart

Nice 📷

Is this review helpful?
(1) Reply
Great product

Dip Halder (Feb 9, 2022) on Flipkart

Nice mobile

Is this review helpful?
Reply
Classy product

Shubham Singh (Feb 9, 2022) on Flipkart

Superb phone

Is this review helpful?
Reply
Wonderful

Sumit Kar (Feb 9, 2022) on Flipkart

Best in loo cost

Is this review helpful?
Reply
Brilliant

Flipkart Customer (Feb 8, 2022) on Flipkart

Very good product

Is this review helpful?
Reply