Karbonn KT21 Express vs Sony Xperia M Dual
General Info
| Manufacturer | |
| Karbonn | Sony |
| Announced | |
| 2012 | June 2013 |
| Status | |
| Available | Available - September 2013 |
| Colors | |
| Black | Black, White, Purple, Yellow |
| Form Factor | |
| Candybar | Candybar |
| Dimension | |
| - |
124 x 62 x 9.3 mm (4.88 x 2.44 x 0.37 in) |
| Weight | |
| - | 115 g (4.06 oz) |
| 2G Network | |
| GSM - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (Both Versions) |
| 3G Network | |
| N/A | HSDPA 900 / 2100 - C2005 HSDPA 850 / 1700 / 1900 / 2100 - C2004 |
| Messaging | |
| SMS, MMS | SMS, MMS, Push Mail, EMail, IM |
Display
Hardware and OS
| OS | |
| - | Android OS, v4.1 (Jelly Bean) |
| Processor | |
| - | Dual-core 1 GHz Krait, Qualcomm MSM8227 [Similar] |
| GPU | |
| - | Adreno 305 [Similar] |
| RAM | |
| N/A | 1 GB [Browse Similar] |
| Internal Memory | |
| - | 4 GB |
| External Memory | |
| microSD, up to 32 GB | microSD, up to 32 GB |
Camera
Multimedia
| 3.5mm Jack | |
| Radio | |
| FM radio, FM recording | Stereo FM radio with RDS |
| Games | |
| Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
Connectivity and Data Rate
| GPRS | |
| Yes | Up to 86 kbps |
| Edge | |
| Yes | Up to 237 kbps |
| 3G | |
| N/A | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | |
| Yes | Yes, v4.0 with A2DP, ANT+ |
| Wi-Fi | |
| No | Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi Direct, DLNA, Wi-Fi hotspot |
| USB | |
| Yes | Yes, microUSB v2.0 |
| GPS | |
| No | Yes, with A-GPS support |
| Browser | |
| Yes | HTML5 |
User Memory
| Phonebook | |
| 2000 entries | Practically unlimited entries and fields, Photocall |
| Call Records | |
| Yes | Practically unlimited |
| Internal | |
| - | 4 GB, 1 GB 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 | |
| 1000 mAh | 1750 mAh |
| Stand by | |
| - | Up to 498 h (2G) Up to 454 h (3G) |
| Talk Time | |
| - | Up to 10 h 16 min (2G) Up to 9 h (3G) |