Karbonn A21 vs Alcatel One Touch Star
General Info
| Manufacturer | |
| Karbonn | Alcatel |
| Announced | |
| 2012 | February 2013 |
| Status | |
| Available | Available - March 2013 |
| Colors | |
| Pearl White | Black, White, Orange |
| Form Factor | |
| Candybar | Candybar |
| Dimension | |
| - |
117.9 x 60.8 x 9.7 mm (4.64 x 2.39 x 0.38 in) |
| Weight | |
| - | 119.5 g (4.2.0.18 oz) |
| 2G Network | |
| GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - 6010 GSM 850 / 900 / 1800 / 1900 - 6010D (SIM 1 & SIM 2) |
| 3G Network | |
| HSDPA 2100 | HSDPA 900 / 2100 |
| Messaging | |
| SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
Display
Hardware and OS
| OS | |
| Android OS, v4.0 (Ice Cream Sandwich) | Android OS, v4.1 (Jelly Bean) |
| Processor | |
| Dual-core 1.2 GHz [Similar] | Dual-core 1 GHz [Similar] |
| GPU | |
| - | - |
| RAM | |
| 512 MB [Browse Similar] | 512 MB [Browse Similar] |
| Internal Memory | |
| 4 GB | 4 GB (2.4 GB user available) |
| External Memory | |
| microSD, up to 32 GB | microSD, up to 32 GB |
Camera
Multimedia
| 3.5mm Jack | |
| Radio | |
| No | - |
| Games | |
| Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
Connectivity and Data Rate
| GPRS | |
| Yes | Yes |
| Edge | |
| Yes | Yes |
| 3G | |
| HSDPA, 7.2 Mbps | HSDPA, HSUPA |
| Bluetooth | |
| Yes, v2.1 with A2DP | Yes, v4.0 with A2DP |
| Wi-Fi | |
| Wi-Fi 802.11 b/g/n | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot |
| USB | |
| Yes, microUSB v2.0 | Yes, microUSB v2.0 |
| GPS | |
| Yes, with A-GPS support | Yes |
| Browser | |
| HTML | HTML |
User Memory
| Internal | |
| 4 GB, 512 MB RAM | 4 GB (2.4 GB user available), 512 MB RAM |
| Expandable Storage | |
| microSD, up to 32 GB | microSD, up to 32 GB |
Sensors
| Fingerprint | |
| Proximity Sensor | |
| Accelerometer Sensor | |
| NFC | |
Battery
| Type | |
| Li-Ion Battery | Li-Ion Battery |
| Capacity | |
| 1800 mAh | 1500 mAh |
| Stand by | |
| Up to 200 h | Up to 300 h (2G) Up to 280 h (3G) |
| Talk Time | |
| Up to 5 h | Up to 4 h 30 min (2G) Up to 3 h 30 min (3G) |