| Hardware and OS | ZTE Blade A521 | vivo Y11 |
| Operating system | Android 7.0 Nougat | Android 4.4.4 (KitKat) |
| Processor | Quad-Core 1.1GHz ARM Cortex A7 | Quad-core 1.3 GHz Cortex-A7 |
| Chipset | | Mediatek MT6582М |
| GPU | Qualcomm Adreno 304 | Mali-400MP2 |
| RAM | 2GB | |
| Internal memory | | 4 GB, 512 MB RAM |
| Internal Storage | 16GB | |
| External memory | | microSD, up to 256 GB (dedicated slot) |
| Memory Card Slot | microSD, microSDHC, microSDXC | |
| User Interface | Yes with MiFavor UI | |
| Display | ZTE Blade A521 | vivo Y11 |
| Type | IPS, LCD capacitive touchscreen | IPS LCD |
| Size | 5.0 inches HD | 4" inc |
| Resolution | 1280 x 720 Pixels, 24 bit color depth | 480 x 800 px |
| Touchscreen | Yes Multi Touch Support | capacitive touchscreen |
| Screen-to-Body Ratio | | 59.2% |
| Display area | | 45.5 cm2 |
| Display aspect ratio | | 5:3 (height:width) |
| Pixel Density | ~ 294 ppi | 233 PPI |
| Protection | Yes Support | |
| Colors | 16M Colors | 16M |
| Features | HD Display, ~ 294 PPI , Capacitive , Multi-touch, Scratch Resistant | |
| Connectivity | ZTE Blade A521 | vivo Y11 |
| 2G Network | | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 4G Network | LTE : 800 / 900 / 1800 / 2100 / 2600 MHz | |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi HotSpot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot |
| Network | | GSM / HSPA |
| SIM card | | Dual SIM (Micro-SIM, dual stand-by) |
| NFC | No | |
| Bluetooth | | 4.0, A2DP, EDR |
| Edge | | Yes |
| GPRS | | Yes |
| SIM | Nano SIM | |
| GPS | Yes, with GPS, A-GPS | Yes, with A-GPS |
| Dual SIM | (Nano, Nano) | |
| Speed | LTE Cat 4 150 Mbps Download, 50 Mbps Upload, HSUPA 5.76 Mbps Upload, HSDPA 21 Mbps Download, EV-DO Rev.A 1.8 Mbps Upload, 3.1 Mbps Download | HSPA 21.1/7.2 Mbps |
| USB | Micro USBv2.0 With Charging and Mass Storage Function | microUSB 2.0, USB Host |
| Camera | ZTE Blade A521 | vivo Y11 |
| Main camera | 8 Megapixels with Single-LED and AF Rear Camera | 5 MP, Single |
| Image | 3264 x 2448 Pixels | |
| Specs | | 5 MP, AF |
| Features | Yes with Single-LED Flash | LED flash |
| Video | | 1080p@30fps |
| Selfie camera | 8 Megapixels | 2 MP, Single |
| Multimedia | ZTE Blade A521 | vivo Y11 |
| Loudspeaker | Yes | |
| Video Playback | Up to 5 Hours | |
| Video Out | Yes With Wireless Media Link | |
| 3.5 mm Jack | yes | Yes |
| Ring Tones | MP3 ringtones | |
| Radio | Yes | FM radio |
| Design | ZTE Blade A521 | vivo Y11 |
| Colors | | White, Black |
| Dimensions | 144X71X8.4mm | 123 x 62.5 x 8.8 mm |
| Weight | 137 grams | 124 g |
| Battery | ZTE Blade A521 | vivo Y11 |
| Capacity | 2,400 mAh | |
| Battery capacity | | 1700 mAh, Removable Li-Po |
| Placement | Non-Removable | |
| Battery life | | Talking time- Up to 11 h (2G) / Up to 8 h (3G)
Music play - Up to 34 h |
| Other | ZTE Blade A521 | vivo Y11 |
| Release date | | 2014, Q4 |
| Sensors | Accelerometer, Proximity, Light | Accelerometer, proximity , Infrared port |
