| Hardware and OS | Realme X9 Ultra | |
| Operating system | Android v11 | |
| Processor | Mediatek MT6889Z Dimensity 1000 (7nm) | |
| RAM | 8 GB | |
| Internal Storage | 128 GB | |
| Display | Realme X9 Ultra | other phones |
| Type | Super AMOLED | |
| Size | 6.55 inches | |
| Resolution | 1080 x 2400 Pixels | |
| Pixel Density | 402 ppi | |
| Touchscreen | Yes, Capacitive Touchscreen, Multi-touch | |
| Connectivity | Realme X9 Ultra | other phones |
| Network support | 5G , 4G , 3G, 2G | |
| WI-FI | Yes, Wi-Fi 802.11, b/g/n | |
| Gps | Yes, with A-GPS, Glonass | |
| Bluetooth | Yes, v5.1 | |
| Dual SIM | Dual SIM, GSM GSM | |
| SIM size | SIM1: Nano, SIM2: Nano | |
| USB connectivity | Mass storage device, USB charging | |
| Camera | Realme X9 Ultra | other phones |
| Main camera | 64 MP 8 MP 2 MP | |
| Front camera | 32 MP | |
| Front camera resolution | 32 MP, f/2.5, 26mm (wide), 1/2.8", 0.8µm | |
| Camera features | Digital Zoom, Auto Flash, Face detection, Touch to focus | |
| Flash | Yes, LED Flash | |
| Autofocus | Yes | |
| Video recording | Yes | |
| Multimedia | Realme X9 Ultra | other phones |
| Loudspeaker | Yes | |
| Design | Realme X9 Ultra | other phones |
| Height | 159.9 mm | |
| Width | 73.4 mm | |
| Thickness | 7.8 mm | |
| Weight | 170 grams | |
| Colours | Black, Aurora | |
| Battery | Realme X9 Ultra | other phones |
| Capacity | 4500 mAh | |
| Type | Li-Polymer | |
| Other | Realme X9 Ultra | other phones |
| Fingerprint sensor | Yes | |
| Fingerprint sensor position | Side | |
| Other sensors | Accelerometer, Gyro, Proximity, Compass | |
