OnePlus 9 vs Realme C51
| Type | Touch | Touch |
| Dimensions | - | 167.20 x 76.70 x 7.99 mm |
| Weight |  | 186.00 g |
| Display size | 6.55" | 6.74" |
| Display | Color / AMOLED 16M colors 120 Hz 1080 x 2400 px (6.55") 402 ppi | Color / IPS TFT 16M colors 90 Hz 720 x 1600 px (6.74") 260 ppi |
| Display protection | Corning Gorilla Glass Buy screen protector
 |  |
| Additional display | | |
| Protection of the secondary display | | |
| Standard battery | Li-Ion 4500 mAhBuy powerbank
| Li-Po 5000 mAhBuy powerbank
|
| Quick battery charging |  | SuperVOOC |
| Wireless battery charging | | |
| Internal memory | 128 GB, 256 GB | 64 GB, 128 GB, 256 GB |
| RAM memory | 8 GB, 12 GB | 4 GB, 3 GB, 6 GB |
| Memory cards | | microSD, microSDHC, microSDXC up to 2000 GBBuy memory card |
| Operating system | Android 11 | Android 13 |
| Interface | - | realme UI T Edition |
| Processor | Qualcomm Snapdragon 888 SM8350 | Unisoc Tiger T612 T7225 |
| Processor clock | 2840 MHz | 1820 MHz |
| GPU | Adreno 660 | ARM Mali G57 @650 MHz |
| Touchscreen | | |
| DualSIM | | |
| SIM cards standard | DualSIM(nanoSIM, nanoSIM) | DualSIM(nanoSIM, nanoSIM) |
| DualSIM mode | dual standby | dual standby |
| Hybrid DualSIM | | |
| Announced | 1Q 2021 | 3Q 2023 |
| Other names | LE2117; LE2110, LE2115 | RMX3830 |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 850 900 1700 1900 2100 | 850 900 2100 |
| LTE standard | FDD LTE: 2600, 2300, 2100, 1900, 1800, 1700, 900, 850, 800, 700, 600 TDD LTE: 2600, 2500, 2300, 2100, 1900 | FDD LTE: 2100, 1800, 900, 850 TDD LTE: 2600, 2500, 2300 |
| Standard 5G | FDD 5G: 2600, 2100, 1800, 700 TDD 5G: 3500, 2500 | |
| CDMA | 850 1900 CDMA2000 1xEV-DO | |
| Standard TD-SCDMA | 1900 2000 | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Camera type | Standard | Standard |
| Photo matrix | 48 Mpx | 50 Mpx |
| Pixel size | 0,8 µm | |
| Resolution | 8000x6000 px | |
| Optical zoom | | |
| Digital zoom | | 4x |
| Number of lenses | | 5 |
| Field of view | | 77 ° |
| Focal length | | 27 mm |
| Flash | 2x LED | LED |
| Dual-colour LED flash | 1+1 | |
| Video resolution | | 1920x1080 px |
| Video formats | H.264, H.265, MPEG4 | H.263, H.264, MPEG4 - 30 fps |
| Additional | AF | AF, f/1.8 |
| Second camera | | |
| Camera type | Wide-angle | Depth of field |
| Photo matrix | 16 Mpx | 0.3 Mpx |
| Resolution | | 640x480 px |
| Optical zoom | | |
| Flash | 2x LED | LED |
| Dual-colour LED flash | 1+1 | |
| Video formats | H.264, H.265, MPEG4 | H.263, H.264, MPEG4 - 30 fps |
| Additional | AF | FF |
| Third camera | | |
| Camera type | Macro | nd |
| Photo sensor model | GalaxyCore GC02M1 | nd |
| Photo matrix | 2 Mpx | nd |
| Sensor size | 1/5 | nd |
| Pixel size | 1,75 µm | nd |
| Optical zoom | | nd |
| Flash | 2x LED | nd |
| Dual-colour LED flash | 1+1 | nd |
| Video formats | H.264, H.265, MPEG4 | nd |
| Additional | FF | nd |
CAMERAS - FRONT
| First camera | | |
| Camera type | Portrait | Portrait |
| Photo sensor model | Sony IMX471 | |
| Photo matrix | 16 Mpx | 5 Mpx |
| Sensor size | 1/3 | |
| Pixel size | 1 µm | |
| Optical zoom | | |
| Number of lenses | | 3 |
| Field of view | | 76 ° |
| Flash | | |
| Dual-colour LED flash | | |
| Video resolution | | 1280x720 px |
| Video formats | H.264, H.265, MPEG4 | H.263, H.264, MPEG4 - 30 fps |
| Additional | FF | FF, f/2.22 |
SENSORS
| Accelerometer | | |
| Proximity | | |
| Light | | |
| Magnetometer | | |
| Gyroscope | | |
| Barometer | | |
| Altimeter | | |
| Gravity | | |
| Hall-effect | | |
| Iris scanner | | |
| Fingerprint scanner | | |
| Thermometer | | |
| Hygrometer | | |
Data transfer
| xHTML | | |
| WAP | v2.0 | v2.0 |
| HSCSD | | |
| HSDPA | 42.20 Mbit/s | 42.20 Mbit/s |
| HSUPA | 11.52 Mbit/s | 5.76 Mbit/s |
| HSPA | | |
| HSPA+ | | |
| LTE DL | | - |
| LTE UP | | 51.00 Mbit/s |
| WIMAX+ | | |
| GPRS | | |
| EDGE | | |
| Bluetooth | v5.2 | v5.0 |
| A2DP Profile | | |
| HDMI | | |
| WiFi | v802.11 a/b/g/n/ac/ax | v802.11 b/g/n |
| WiFi frequencies | 2,4 GHz; 5 GHz | 2,4 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | v3.1 Type-C | v2.0 Type-C |
| GPS | | |
| A-GPS | | |
| GLONASS | | |
| Beidou | | |
| Galileo | | |
| QZSS | | |
| NFC | | |
COMMUNICATION AND MESSAGING
| Call waiting | | |
| Conferency | | |
| Call forwarding | | |
| Push To Talk | | |
| Instant Messenger | | |
| SMS | | |
| EMS | | |
| MMS | | |
| Dictionary | T9 | T9 |
| Swype | | |
| e-mail client | POP3, IMAP4, SMTP | POP3, IMAP4, SMTP |
| Hardware QWERTY keyboard | | |
| RSS Reader | | |
Multimedia
| Radio | | |
| MP3 | | |
| Stereo speakers | 2 | |
| Audio Jack | 3.5 mm | 3.5 mm |
| HD Voice | | |
| Sound formats | AAC, AAC+, AC3, AC4, AMR, APE, EAC3, EAC3-JOC, FLAC, IMY, M4A, MID, OGG, WAV, WMA | AAC, AAC+, AMR, APE, FLAC, MID, MKA, OGG, WAV, WMA, eAAC+ |
| Polyphony | | |
| Video ringtone | | |
| Ring composer | | |
| Games | | |
| Java | ART | ART |
| Videophone | | |
| DVB-H television | | |
| TV-Out | | |
PIM AND ADDITIONAL FUNCTIONS
| Watch | | |
| Stopwatch | | |
| Alarm | | |
| Calculator | | |
| Currency converter | | |
| Organizer | | |
| Calendar | | |
| Flight mode | | |
| SyncML | | |
| Data and fax | | |
| Screensaver | | |
| Themes | | |
| Interchangeable covers | | |
| Voice dial | | |
| Speakerphone | | |
| Recorder | | |
| Vibrations | | |