| Celkon | Symphony | |
Celkon Campus A15 3,299 | Symphony i21 3,999 | |
| Processor-CPU | 1 GHz Dual Core Processor | 1.3 GHz Quad Core Cortex A7 Processor | Graphics Processor-GPU | Mali-400 |
|---|---|---|
| Screen Size | 3.50 inch | 5.00 inch |
| Screen Resolution | 320 x 480 Pixels | HD, 1280 x 720 Pixel |
| Color Options | White | Black, Gold, Grey |
| Operating System | Android Jelly Bean | Android Marshmallow |
|---|---|---|
| OS Version | 4.2.2 | 6.0 |
| Primary Camera | 3.20 Mega Pixel | 8.00 Mega Pixel |
|---|---|---|
| Front Camera | 0.00 Mega Pixel | 5.00 |
| RAM | 256.00 MB | 1.00 GB |
|---|---|---|
| Internal Storage | 512 MB | 8 GB |
| Expandable upto | 32 GB | 32 GB |
| Battery Capacity | 1400 mAh | 2500 mAh |
|---|
| Network Signal | GSM | GSM |
|---|---|---|
| SIM Type | Regular | Micro |
| Dual SIM | GSM+GSM | Dual Sim Standby (GSM +GSM) |
| 3G | No | Yes |
| 4G/LTE | No | No |
| VoLTE | No | No |
| WiFi | Yes | Yes |
| FM Radio | Yes | Yes |
| Navigation | E-GPRS | GPS, AGPS With Google Maps |
|---|---|---|
| Sensors | Acceleromete | Accelerometer, Light Sensor, Proximity Sensor |
| Bluetooth | Yes | 2.1 |
| NFC | No | No |
| Height | 0.00 mm. | 145.50 |
|---|---|---|
| Width | 0.00 mm. | 72.60 |
| Thickness | 0.00 mm. | 8.85 |
| Weight | 0.00 gm. | 144.00 |
| USP |
|---|