Phone Comparison - Karbonn A21 vs Samsung Galaxy Grand 2 vs Sony Xperia E3
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| Manufacturer | Karbonn | Samsung | Sony |
| Announced | 2012 | November 2013 | September 2014 |
| Status | Available | Available - Q4 2013 | Available - September 2014 |
| Colors | Pearl White | Black, White, Pink | Black, White, Lime, Copper |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension | - |
146.8 x 75.3 x 8.9 mm (5.78 x 2.96 x 0.35 in) |
137.7 x 69.4 x 8.5 mm (5.42 x 2.73 x 0.33 in) |
| Weight | - | 163 g (5.75 oz) | 143 g (5.04 oz) |
| 2G Network | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SM-G7100 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 - G7102 |
GSM 850 / 900 / 1800 / 1900 - D2203, D2206, D2243, D2202 |
| 3G Network | HSDPA 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 2100 - D2203 HSDPA 850 / 900 / 1900 / 2100 - D2202 |
| 4G Network | - | LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800) - SM-G7105 | LTE 800 / 850 / 1800 / 2100 / 2600 - D2203 |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
| Build Features | - | - | Shatter Proof Glass |
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| OS | Android OS, v4.0 (Ice Cream Sandwich) | Android OS, v4.3 (Jelly Bean) | Android OS, v4.4 (KitKat) |
| Processor | Dual-core 1.2 GHz | Quad-core 1.2 GHz Cortex-A7 | Quad-core 1.2 GHz, Qualcomm MSM8926-2 |
| GPU | - | - | Adreno 305 |
| RAM | 512 MB | 1.5 GB | 1 GB |
| Internal Memory | 4 GB | 8 GB | 4 GB |
| External Memory | microSD, up to 32 GB | microSD, up to 64 GB | microSD, up to 32 GB |
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| Type | TFT capacitive touchscreen | TFT capacitive touchscreen | IPS LCD Capacitive Touchscreen |
| Colors | 256K colors | 16M colors | 16M colors |
| Size | 4.5 inches | 5.25 inches | 4.5 inches |
| Resolution | 480 x 800 pixels (207 ppi) | 720 x 1280 pixels (280 ppi) | 480 x 854 pixels (218 ppi) |
| Screen-to-Body Ratio | - | 68.61% | 58.23% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | FM Radio with Recording | FM radio with RDS |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592х1944 pixels | 8 MP, 3264x2448 pixels | 5 MP, 2592 х 1944 pixels |
| Flash | LED flash | LED flash | LED Flash |
| Features | Auto focus, Geo-tagging, Face Detection | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection, Image Stabilization | Auto focus, Geo-tagging, Touch Focus, Face Detection, Image Stabilization, HDR, Panorama |
| Video | Yes | Yes, 1080p@30fps, stereo sound rec. | 1080p@30fps |
| Front Camera | Yes, 1.3 MP [Similar] | Yes, 1.9 MP, 720p [Similar] | VGA [Similar] |
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| GPRS | Yes | Yes | Up to 107 kbps |
| Edge | Yes | Yes | Up to 296 kbps |
| 3G | HSDPA, 7.2 Mbps | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSDPA, 42 Mbps; HSUPA, 5.8 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL |
| Bluetooth | Yes, v2.1 with A2DP | Yes, v4.0 with A2DP, LE, EDR | v4.0, A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n | Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi hotspot, DLNA | Wi-Fi 802.11 b/g/n, dual-band, Wi-Fi Direct, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0 | microUSB v2.0 (MHL 3), USB On-the-go, USB Host |
| GPS | Yes, with A-GPS support | Yes, with A-GPS, support and GLONASS | Yes, with A-GPS |
| Browser | HTML | HTML5 | HTML5 |
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| Internal | 4 GB, 512 MB RAM | 8 GB, 1.5 GB RAM | 4 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 64 GB | microSD, up to 32 GB |
| USB OTG | - | - | Supported |
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| Fingerprint | |
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| Proximity Sensor | |
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| Accelerometer Sensor | |
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| NFC | |
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| Type | Li-Ion Battery | Li-Ion Battery | Non-removable Li-Ion Battery |
| Capacity | 1800 mAh | 2600 mAh | 2330 mAh |
| Stand by | Up to 200 h | - | Up to 706 h |
| Talk Time | Up to 5 h | Up to 17 h | Up to 12 h 20 min |
