Realme C51s

The Realme C51s measures 167.2 mm tall, 76.7 mm wide, and 7.5 mm thick, with a weight of 182g and a total volume of 96.18 cm³. It holds an IP54 ingress protection rating, offering resistance against dust and water splashes. The device is a conventional fixed-form smartphone — it has neither a rugged build nor a folding design.

The Realme C51s uses a 6.74″ IPS LCD touchscreen with a resolution of 720 x 1600 pixels at 260 ppi, and a 90Hz refresh rate for smoother on-screen motion. The panel does not feature branded damage-resistant glass, and there is no support for HDR10, HDR10+, or Dolby Vision. Always-On Display is not available, and the device has a single screen with no secondary display.

The Realme C51s is powered by the Unisoc T612 chipset, built on a 12nm process with an 8-thread CPU configuration running at 1.8 GHz across all cores, using big.LITTLE technology for workload management. It comes with 6GB of DDR4 RAM running at 1866 MHz and 128GB of eMMC 5.1 internal storage, with a maximum supported memory amount of 8GB and a peak memory bandwidth of 12.8 GB/s. Graphics are handled by the Mali G57 MP1 GPU, which features 2 execution units, 32 shading units, and a turbo clock of 614.4 MHz, with support for DirectX 11 and OpenCL 2.0. The SoC also integrates LTE, supports 64-bit processing, and includes ARM TrustZone for hardware-level security. Cache configuration consists of 128KB L1, 2MB L2, and 1MB L3.

The main camera system is a dual-lens setup led by a 50MP CMOS sensor with an f/1.8 aperture, phase-detection autofocus, touch autofocus, and continuous autofocus during video recording. Manual controls cover ISO, exposure, focus, and white balance, and the camera also supports HDR mode, burst shooting, slow-motion video, and in-camera panoramas, though manual shutter speed, optical zoom, and RAW capture are not available. Video recording is capped at 1080p at 30fps, with no HDR10 or Dolby Vision recording support. A single LED flash is fitted, with no dual-tone or RGB flash option. The 5MP front camera sits behind an f/2.2 aperture and is a single-lens unit positioned on the front of the display frame — there is no under-screen placement, no front-facing flash, and no laser autofocus on either camera.

The Realme C51s runs Android 13 and includes a solid set of privacy controls, covering clipboard warnings, location privacy options, camera and microphone access management, and the ability to block app tracking — though cross-site tracking blocking and Mail Privacy Protection are not present. On the usability side, the OS supports dark mode, extra dim mode, dynamic theming, theme customization, customizable notifications, full-page scrolling screenshots, split-screen multitasking, Picture-in-Picture, a media picker, sharing intents, widgets, a child lock, and the ability to play games while they are still downloading. Offline voice recognition and voice commands are both available, as is on-device machine learning, Live Text, phone tracking, and multi-user support. Wi-Fi password sharing, focus modes, app offloading, battery health check, Quick Start, and the ability to use the device as a PC are not supported, and OS updates do not come directly from the vendor.

The Realme C51s houses a 5000mAh rechargeable battery with a battery level indicator and support for 33W wired fast charging, with a charger included in the box. Wireless charging is not available, and the battery is not user-removable.

The Realme C51s includes a 3.5mm headset jack for wired audio connections, but the speaker setup is mono — stereo speakers are not present. Bluetooth audio codec support is limited, with no aptX, aptX HD, aptX Adaptive, aptX Lossless, or LDAC on board. There is also no built-in radio.

The Realme C51s supports dual SIM cards and connects wirelessly via Wi-Fi 4 and Wi-Fi 5, Bluetooth 5.0, and NFC, though 5G is not available — cellular connectivity is limited to LTE and below, with download speeds up to 300 Mbit/s and upload speeds up to 100 Mbit/s. The USB Type-C port handles wired connections, and an external memory slot allows for storage expansion. For location and motion sensing, the device includes GPS with Galileo support, a compass, gyroscope, and accelerometer, while a barometer, infrared sensor, heart rate monitor, and ANT+ are all absent. Security is handled by a fingerprint scanner, with no iris scanner, 3D facial recognition, or stylus included. Satellite SOS, crash detection, HDMI output, DLNA certification, motion tracking, optical tracking, and a built-in projector are also not featured.

The Realme C51s includes a video light to assist with recording in low-light conditions. The display is flat rather than curved, uses neither sapphire glass nor an e-paper panel.