| Hardware and OS Lava Z91 |
| Operating system: | Android 7.1 (Nougat) |
| Processor: | Quad-core 1.3 GHz Cortex-A53 |
| Chipset: | Mediatek MT6739 (28 nm) |
| GPU: | PowerVR GE8100 |
| Internal memory: | 32 GB, 3 GB RAM |
| External memory: | microSD, up to 128 GB (dedicated slot) |
| Display Lava Z91 |
| Type: | IPS LCD |
| Size: | 5.7" inc |
| Resolution: | 720 x 1440 px |
| Touchscreen: | capacitive touchscreen |
| Screen-to-Body Ratio: | 75.7% |
| Display area: | 83.8 cm2 |
| Display aspect ratio: | 18:9 (height:width) |
| Pixel Density: | 282 PPI |
| Colors: | 16M |
| Connectivity Lava Z91 |
| 2G Network: | GSM 900 / 1800 - SIM 1 & SIM 2 |
| 3G Network: | HSDPA 900 / 2100 |
| 4G Network: | LTE band 1(2100), 3(1800), 5(850), 40(2300), 41(2500) |
| Wi-Fi: | Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot |
| Network: | GSM / HSPA / LTE |
| SIM card: | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth: | 4.0, A2DP |
| Edge: | Yes |
| GPRS: | Yes |
| GPS: | Yes, with A-GPS |
| Speed: | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
| USB: | microUSB 2.0, USB On-The-Go |
| Camera Lava Z91 |
| Main camera: | 13 MP,
Single |
| Specs: | 13 MP, f/2.0, 1.12µm, AF |
| Features: | LED flash |
| Features: | LED flash |
| Video: | 1080p@30fps |
| Selfie camera: | 8 MP,
Single |
| Specs: | 8 MP, f/2.2 |
| Multimedia Lava Z91 |
| 3.5 mm Jack: | Yes |
| Radio: | FM radio |
| Design Lava Z91 |
| Colors: | Blue |
| Dimensions: | 152 x 72.9 x 7.7 mm |
| Weight: | 147 g |
| Battery Lava Z91 |
| Battery capacity: | 3000 mAh, Non-removable Li-Po |
| Other Lava Z91 |
| Release date: | 2018, March |
| Sensors: | Fingerprint (rear-mounted), accelerometer, proximity |
