| Hardware and OS | Karbonn X21 | vivo Y11 |
| Operating system | Android v10 | Android 4.4.4 (KitKat) |
| Processor | 1.6 GHz, Octa Core Processor | Quad-core 1.3 GHz Cortex-A7 |
| Chipset | Unisoc SC9863 | Mediatek MT6582М |
| GPU | | Mali-400MP2 |
| RAM | 2 GB | |
| Internal memory | 32 GB | 4 GB, 512 MB RAM |
| External memory | | microSD, up to 256 GB (dedicated slot) |
| Memory Card Slot | Yes, upto 256 GB | |
| Dual Sim | Yes | |
| Sim Size | Nano Nano SIM | |
| Sim Type | Dual Sim, GSM GSM | |
| Display | Karbonn X21 | vivo Y11 |
| Type | | IPS LCD |
| Size | | 4" inc |
| Resolution | | 480 x 800 px |
| Touchscreen | | capacitive touchscreen |
| Screen Size | 5.45 inches, 1440 x 720 pixels | |
| Screen-to-Body Ratio | | 59.2% |
| Display Type | Color HD FullView Display | |
| Display area | | 45.5 cm2 |
| Display aspect ratio | 18:9 | 5:3 (height:width) |
| Touch Screen | Yes, with Multitouch | |
| Pixel Density | ~295 PPI | 233 PPI |
| Colors | | 16M |
| Connectivity | Karbonn X21 | vivo Y11 |
| 3G Network | Yes | |
| 2G Network | | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 4G Network | Yes | |
| Wi-Fi | | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot |
| Network | | GSM / HSPA |
| SIM card | | Dual SIM (Micro-SIM, dual stand-by) |
| Bluetooth | Yes, v4.2 | 4.0, A2DP, EDR |
| Edge | Yes | Yes |
| GPRS | Yes | Yes |
| USB Features | USB on-the-go, USB Charging | |
| GPS | Yes | Yes, with A-GPS |
| VoLTE | Yes | |
| Speed | | HSPA 21.1/7.2 Mbps |
| Wifi | Yes, with wifi-hotspot | |
| USB | Yes, microUSB | microUSB 2.0, USB Host |
| Camera | Karbonn X21 | vivo Y11 |
| Main camera | 8 MP with autofocus | 5 MP, Single |
| Video Recording | 1080p | |
| Specs | | 5 MP, AF |
| Flash | Yes, LED | |
| Features | Panorama, Burst Mode, Time Lapse, Face Beauty, Night Mode | LED flash |
| Video | | 1080p@30fps |
| Selfie camera | 5 MP with LED Flash | 2 MP, Single |
| Multimedia | Karbonn X21 | vivo Y11 |
| Headphone jack | Yes | |
| Email | Yes | |
| 3.5 mm Jack | | Yes |
| FM Radio | Yes | |
| Radio | | FM radio |
| Music | Yes | |
| Video | Yes | |
| Browser | Yes | |
| Java | No | |
| Design | Karbonn X21 | vivo Y11 |
| Colors | | White, Black |
| Dimensions | 147.5 x 71.8 x 9.35 mm | 123 x 62.5 x 8.8 mm |
| Weight | 160 g | 124 g |
| Battery | Karbonn X21 | vivo Y11 |
| Battery capacity | 3000 mAh | 1700 mAh, Removable Li-Po |
| Battery life | | Talking time- Up to 11 h (2G) / Up to 8 h (3G)
Music play - Up to 34 h |
| Type | Removable Battery | |
| Reverse Charging | Yes | |
| Other | Karbonn X21 | vivo Y11 |
| Release date | | 2014, Q4 |
| Sensors | | Accelerometer, proximity , Infrared port |
