General
| Brand name | BLU |
| Model | S91 |
| Announced | Friday, 24 June 2022 |
| Released | Friday, 24 June 2022 |
| Status | Available |
Design
| Height | 164.8 mm (6.49 inch) |
| Width | 76.3 mm (3.00 inch) |
| Thickness | 8.9 mm (0.35 inch) |
| Weight | 202 g (7.13 oz) |
| Colors | Black, Green |
Display
| Display type | IPS LCD |
| Display size | 6.5 inch |
| Resolution | 720 × 1600 pixels |
| Aspect ratio | 20:9 |
| Pixel density | 270 ppi |
| Screen-to-body ratio | ≈ 81.1% |
| Touch screen | Yes |
| Bezel-less display | Yes |
| Features | Capacitive Touchscreen, Multi-touch |
Hardware
| Chipset | MediaTek Helio G25 |
| CPU cores | Octa-core |
| CPU technology | 12 nm |
| CPU max speed | 2.0 GHz |
| CPU architecture | 64-bit |
| Microarchitecture | Cortex-A53 |
| Memory type | LPDDR3, LPDDR4X |
| GPU | IMG PowerVR GE8320 |
| RAM | 4GB |
| Storage | 128GB |
| Expandable Storage | Yes |
| Card slots | microSDXC |
Software
| Operating system | Android 11 (Red Velvet Cake) |
| Google Play Services | Yes |
Main camera
| Camera support | Yes |
| Triple camera | 13 MP ( Wide-angle )
Autofocus (PDAF)
0.3 MP, f/2.4 ( Macro ) 0.3 MP, f/2.4 ( Depth ) |
| Flash support | Yes |
| Flash type | LED Flash |
| Features | High Dynamic Range (HDR) Panorama |
| Video support | Yes |
| Video resolution | 1080p @ 30 fps |
Front camera
| Camera support | Yes |
| Single camera | 13 MP |
| Video support | Yes |
| Video resolution | 1080p @ 30 fps |
Battery
| Type | Li-Poly |
| Capacity | 5000 mAh |
| Removability | Non removable |
Network
| SIM cards | Dual SIM |
| SIM type | Nano-SIM |
| VoLTE support | Yes |
| Data speed | LTE, HSPA 42.2/5.76 Mbps |
| 2G bands | GSM: 850 / 900 / 1800 / 1900 MHz |
| 3G bands | HSPA: 850 / 900 / 1700 / 1900 / 2100 MHz |
| 4G bands | LTE: b1 (2100), b2 (1900), b3 (1800), b4 (1700), b5 (850), b7 (2600), b12 (700), b13 (700), b17 (700), b28 (700), b66 (1700 MHz) |
Connectivity
| Wi-Fi support | Yes ( Wi-Fi 4 ) |
| Wi-Fi standards | 802.11/b/a/g/n |
| Wi-Fi features | Mobile Hotspot, Wi-Fi Direct |
| Bluetooth | Yes, v5.0 |
| USB ports | USB Type-C 2.0 USB On-The-Go |
| USB connectivity | USB charging, USB Mass storage device |
| GPS support | Yes |
| GPS features | A-GPS |
| NFC support | No |
Multimedia
| Loudspeaker | Yes |
| Headphone jack | Yes |
| Radio FM | Yes |
Features
| Sensors | Accelerometer Compass / Magnetometer Fingerprint Sensor Gyroscope Proximity sensor |
