Karbonn KT21 Express
| Network | 2G 3G | GSM - SIM 1 & SIM 2 |
| Size | Dimensions Weight Display | TFT capacitive touchscreen 2.8 inches |
| Memory | Phonebook Call records Internal Card slot | 2000 entries Yes microSD, up to 32 GB |
| Data | GPRS EDGE 3G WLAN Bluetooth Infrared port USB | Yes Yes Yes Yes |
| Features | OS CPU Messaging Ringtones Browser Radio GPS Games Camera Video Colors Java | SMS, MMS, Email Vibration, Polyphonic(64), MP3 ringtones WAP 2.0/xHTML FM radio, FM recording Yes 3.15 MP, 2048x1536 pixels, LED flash Yes Black Yes - Loudspeaker - Dual SIM (Mini-SIM) - 3.5mm jack - Proximity (sensor) - Audio/video player - Image viewer - Organizer - Clock - Calendar - Alarm |
| Battery | Stand-by Talk time | Standard battery, Li-Ion 1000 mAh Up to Up to |
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