| Hardware and OS | Lava Z91 (2GB) | |
| Operating system | Android 7.1 (Nougat) | |
| Processor | Quad-core 1.3 GHz Cortex-A53 | |
| Chipset | Mediatek MT6739 (28 nm) | |
| Internal memory | 16GB 2GB RAM | |
| External memory | microSDXC (dedicated slot) | |
| GPU | PowerVR GE8100 | |
| Display | Lava Z91 (2GB) | other phones |
| Size | 5.7 inches, 83.8 cm2 | |
| Resolution | 720 x 1440 pixels, 18:9 ratio | |
| Type | IPS LCD capacitive touchscreen, 16M colors | |
| Main Camera | Lava Z91 (2GB) | other phones |
| Camera | 13 MP, f/2.0, 1/3.1", 1.12?m, AF | |
| Features | LED flash | |
| Video | 1080p@30fps | |
| Selfie camera | Lava Z91 (2GB) | other phones |
| Camera | 8 MP, f/2.2 | |
| Features | LED flash | |
| Connectivity | Lava Z91 (2GB) | other phones |
| 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) | |
| Bluetooth | 4.0, A2DP | |
| GPS | Yes, with A-GPS | |
| Speed | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | |
| Technology | GSM / HSPA / LTE | |
| USB | microUSB 2.0, USB On-The-Go | |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | |
| Multimedia | Lava Z91 (2GB) | other phones |
| 3.5 mm Jack | Yes | |
| Loudspeaker | Yes | |
| Radio | FM radio | |
| Battery | Lava Z91 (2GB) | other phones |
| Capacity | Non-removable Li-Po 3000 mAh battery | |
| Design | Lava Z91 (2GB) | other phones |
| Colors | Blue | |
| Dimensions | 152 x 72.9 x 7.7 mm (5.98 x 2.87 x 0.30 in) | |
| Weight | 147 g (5.19 oz) | |
| SIM | Dual SIM (Nano-SIM, dual stand-by) | |
| Features | Lava Z91 (2GB) | other phones |
| Sensors | Fingerprint (rear-mounted), accelerometer, proximity | |
