Karbonn A21 vs Nokia Lumia 928
General Info
| Manufacturer | |
| Karbonn | Nokia |
| Announced | |
| 2012 | April 2013 |
| Status | |
| Available | Available - May 2013 |
| Colors | |
| Pearl White | Black, White |
| Form Factor | |
| Candybar | Candybar |
| Dimension | |
| - |
133 x 68.9 x 10.1 mm (5.24 x 2.71 x 0.4 in) |
| Weight | |
| - | 162 g (5.71 oz) |
| 2G Network | |
| GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 CDMA 800 / 1900 |
| 3G Network | |
| HSDPA 2100 | HSDPA 850 / 900/ 1900 / 2100 CDMA2000 1xEV-DO |
| 4G Network | |
| - | LTE |
| Messaging | |
| SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
Display
Hardware and OS
| OS | |
| Android OS, v4.0 (Ice Cream Sandwich) | Microsoft Windows Phone 8 |
| Processor | |
| Dual-core 1.2 GHz [Similar] | Dual-core 1.5 GHz, Qualcomm MSM8960 Snapdragon [Similar] |
| GPU | |
| - | Adreno 225 [Similar] |
| RAM | |
| 512 MB [Browse Similar] | 1 GB [Browse Similar] |
| Internal Memory | |
| 4 GB | 32 GB storage |
| External Memory | |
| microSD, up to 32 GB | No |
Camera
| Rear Camera | |
| 5 MP, 2592х1944 pixels [Similar] | 8.7 MP, 3264 x 2448 pixels [Similar] |
| Flash | |
| LED flash | Xenon Flash |
| Features | |
| Auto focus, Geo-tagging, Face Detection | 1.4 µm pixel size, PureView Technology, Geo-tagging, Touch Focus, Panorama, Carl Zeiss optics, optical image stabilization, autofocus, Automatic motion blur reduction |
| Video | |
| Yes | Yes, 1080p@30fps, video stabilization |
| Front Camera | |
| Yes, 1.3 MP [Similar] | Yes, 1.3 MP, 720p@30fps [Similar] |
Multimedia
| 3.5mm Jack | |
| Radio | |
| No | No |
| Games | |
| Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
Connectivity and Data Rate
| GPRS | |
| Yes | Yes |
| Edge | |
| Yes | Up to 237 kbps |
| 3G | |
| HSDPA, 7.2 Mbps | EV-DO Rev. A, up to 3.1 Mbps, HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps; LTE, Cat3, 50 Mbps UL, 100 Mbps DL |
| Bluetooth | |
| Yes, v2.1 with A2DP | Yes, v3.0 with A2DP |
| Wi-Fi | |
| Wi-Fi 802.11 b/g/n | Wi-Fi 802.11 a/b/g/n, dual-band, DLNA, Wi-Fi hotspot, Wi-Fi Channel Bonding |
| USB | |
| Yes, microUSB v2.0 | Yes, microUSB v2.0 |
| GPS | |
| Yes, with A-GPS support | Yes, with A-GPS support and GLONASS |
| Browser | |
| HTML | HTML5 |
User Memory
| Internal | |
| 4 GB, 512 MB RAM | 32 GB storage, 1 GB RAM |
| Expandable Storage | |
| microSD, up to 32 GB | No |
Sensors
| Fingerprint | |
| Proximity Sensor | |
| Accelerometer Sensor | |
| NFC | |
Battery
| Type | |
| Li-Ion Battery | Non-removable Li-Ion battery (BV-4NW) |
| Capacity | |
| 1800 mAh | 2000 mAh |
| Stand by | |
| Up to 200 h | Up to 606 h (2G) Up to 541 h (3G) |
| Talk Time | |
| Up to 5 h | Up to 11 h 48 min (2G) Up to 16 h 12 min (3G) |