Coolpad D21 vs Airnet K51

Comparing the Coolpad D21 vs Airnet K51 across display and battery to help determine the better smartphone.

Here is the summary of the results:

Display: Coolpad D21 offers a screen size of 2.2 inches, while Airnet K51 offers 2 inches, making Coolpad D21 the larger display of the two. Both Coolpad D21 and Airnet K51 feature the same LCD display.

Battery: Coolpad D21 offers a higher battery capacity with 2000 mAh, while Airnet K51 offers 1500 mAh, making Coolpad D21 better for longer battery life.

Coolpad D21

(Discontinued)

Airnet K51

(Discontinued)

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Summary

Release Date

N/A	04 Apr, 2011

Display

2.2 inches (5.59 cm)	2 inches (5.08 cm)
LCD	LCD

Rear Camera

N/A	0.3 MP Primary Camera

Battery

2000 mAh

1500 mAh

User Feedback

Display

Display Type

LCD

Screen Size

2.2 inches (5.59 cm)

2 inches (5.08 cm)

Rear Camera

Resolution

N/A	0.3 MP Primary Camera

Flash

N/A

Yes

Shooting Modes

N/A	Continuous Shooting

Camera Features

N/A	Digital Zoom Smile detection

Battery

Capacity

2000 mAh

1500 mAh

Battery Type

Li-ion

Storage

Expandable Storage

Yes Up to 2 GB

Yes Up to 8 GB

Network & Connectivity

SIM Slot(s)

Single SIM

Dual SIM

Network Support

5G Not Supported

Wi-Fi

Bluetooth

Yes

Multimedia

Music

Yes Music Formats: Yes MP3 player

Yes Music Formats: Yes MP3 Player with Sound Recording and Stereo Sound

Sensors

Java

N/A

Browser

Yes

Phone Book

1000 Entries

Yes

SMS

N/A

Yes

MMS

100

Yes

Other Facilities

Alarm Clock Calendar Calculator Memo Handwriting Recognition Software Wallpaper Text input predictive software.

N/A