Compare Karbonn A1 Plus vs Karbonn A21 vs Asus Zenfone 4

Summary
21
36
43
Performance

N/A

Dual core

1200 MHz, 512 MB RAM

Dual core

1200 MHz, 1 GB RAM

Display

3.5" (Small)

320x480, Low sharpness

4.5" (Medium)

480x800, Avg sharpness

4.0" (Medium)

480x800, Avg sharpness

Camera

3 MP (Main)

0.3 MP (Front)

5 MP (Main)

1.3 MP (Front)

5 MP (Main)

0.3 MP (Front)

Battery

1500 mAh

4 h talktime (2G)

1800 mAh

5 h talktime (2G)

1600 mAh

Storage

165 MB

32 GB (Expandable)

4 GB

32 GB (Expandable)

8 GB

64 GB (Expandable)

General
Operating System

Android v2.3 (Gingerbread)

Android v4 (Ice Cream Sandwich)

Android v4.3 (Jelly Bean)

SIM Slot(s)

Dual SIM, GSM+GSM

Dual SIM, GSM+GSM

Dual SIM, GSM+GSM

SIM Size

Micro

Performance
Basic
Good
Good
Processor

1 GHz

Dual core, 1.2 GHz, Qualcomm Snapdragon

Dual core, 1.2 GHz, Chipset: Intel Atom Z2520

Graphics Card

PowerVR SGX 544MP2

RAM

256 MB

512 MB

1 GB

Storage
Good
Very Good
Excellent
Internal Memory

165 MB

4 GB

8 GB

Expandable Memory

Yes, Up to 32 GB

Yes, Up to 32 GB

Yes, Up to 64 GB

USB OTG Support

Display
Basic
Fair
Good
Screen Size

3.5 Inch

4.5 Inch

4.0 Inch

Screen Resolution

320 x 480 pixels

480 x 800 pixels

480 x 800 pixels

Pixel Density

165 ppi

207 ppi

233 ppi

Display Type

TFT

TFT

LCD

Camera
Basic
Fair
Fair
Main Camera

Yes, 3 MP

Yes, 5 MP, Auto focus

Yes, 5 MP, Auto focus

Front Camera

Yes, 0.3 MP

Yes, 1.3 MP

Yes, 0.3 MP

Flash

LED

LED

Video Recording

Full HD @ 30 FPS, HD @ 30 FPS

Zoom

Yes, Digital Zoom

Yes, Digital Zoom

Yes, Digital Zoom

Camera Features

Continuos Shooting, Scenes

Auto Focus

Geo tagging

Battery
Good
Good
Good
Capacity

1500 mAH, Li-ion

1800 mAH, Li-ion

1600 mAH, Li-Po

Talk Time

Up to 4 Hours(2G)

Up to 5 Hours(2G)

Stand By Time

Up to 240 Hours(2G)

Up to 200 Hours(2G)

Connectivity
Operating Frequency

GSM 1800 / 1900 / 900 MHz | GSM 1800 / 1900 / 900 MHz

GSM 1800 / 1900 / 900 MHz
UMTS 2100 MHz | GSM 1800 / 1900 / 900 MHz

GSM 1800 / 1900 / 850 / 900 MHz
UMTS 1900 / 2100 / 850 / 900 MHz | GSM 1800 / 1900 / 850 / 900 MHz

GPRS

Yes

Yes

Yes

Edge

Yes

Yes

Yes

3G

Yes, HSDPA 7.2 Mbit/s, HSUPA

Yes, HSDPA 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Wi-Fi

Yes, Wi-Fi 802.11, Mobile Hotspot

Yes, Wi-Fi 802.11, b/g/n

Yes, Wi-Fi 802.11, b/g/n, Mobile Hotspot, Wi-Fi Direct

Bluetooth

Yes, v2.1

Yes, v2.1, A2DP

Yes, v4.0, EDR, A2DP

GPS

Yes

Yes, with A-GPS, Glonass, GPS

USB Connectivity

Yes, USB Port, microUSB 2.0

Yes, USB Port, USB 2.0, microUSB 2.0

Yes, USB Port, USB 2.0, Mass storage device, USB charging, microUSB 2.0

More Connectivity

Computer sync, OTA sync, Tethering

Design
Touch Screen

Yes, Capacitive Touchscreen, Multi-touch

Yes, Capacitive Touchscreen, Multi-touch

Yes, Capacitive Touchscreen, Multi-touch

Weight

130 grams

104 grams

115 grams

Dimensions

114.5 x 60.6 x 13.8 mm

112 x 60.5 x 11.5 mm

124.4 x 61.4 x 11.5 mm

Colours

Stylus

Ruggedness

Multimedia
FM Radio

Yes

Yes

Loudspeaker

Yes

Yes

Yes

Audio Jack

3.5 mm

3.5 mm

3.5 mm

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expert reviews
Karbonn A21 Review, Price, Specifications

Karbonn has been making news recently with its dual-core Android-based smartphones and the A21 is the latest entrant in its Android smartphone line-up....

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Overall User Rating
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4/5 based on 2 ratings

Sanjay Delhi
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o yaar kya ismein adobe reader chalta ae????????????? please btao....

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3.4/5 based on 5 ratings

Sanjay Delhi
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worth for the money.recommendable....

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3.8/5 based on 4 ratings

Sanjay Delhi
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I've been using zenfone 4 for the past month and here's what i noticed.. i'd like to differ with the site's review, the phone does have a FM radio. The camera is nice,touch is also good I've been using zenfone 4 for the past mo....

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