Tecno Spark 40C

The Tecno Spark 40C has a non-folding, non-rugged form factor measuring 165.6 mm tall, 77 mm wide, and 8.4 mm thick, resulting in a total volume of 107.11 cm³. A notable aspect of its build is the IP64 rating, which certifies the device against complete dust ingress and water splashing from any direction, making it water resistant for everyday scenarios.

The Tecno Spark 40C uses an IPS LCD touchscreen measuring 6.67″ with a resolution of 720 x 1600 px and a pixel density of 263 ppi. One of its more notable display traits is the 120Hz refresh rate, which contributes to smoother on-screen motion despite the HD-level resolution. The panel does not support HDR10, HDR10+, or Dolby Vision, and there is no Always-On Display mode, no secondary screen, and no branded damage-resistant glass protecting the surface.

The Tecno Spark 40C is driven by the MediaTek Helio G81 Ultra, a 12 nm octa-core SoC configured as 2 cores at 2 GHz and 6 cores at 1.8 GHz with a turbo ceiling of 2 GHz, using big.LITTLE technology across 8 threads and operating within a 5W TDP envelope. The chip integrates LTE, TrustZone security, and a Mali G52 MP2 GPU clocked up to 950 MHz with 2 execution units and 32 shading units, supporting DirectX 12, OpenGL 3.2, OpenGL ES 3.2, and OpenCL 2. The SoC is built on 5,500 million transistors and pairs with 8 GB of DDR4 RAM running at 1800 MHz across 2 memory channels, delivering a maximum memory bandwidth of 13.41 GB/s, alongside 256 GB of eMMC 5.1 internal storage — with 8 GB also being the maximum supported memory amount. Cache layout consists of 0.3 MB of L2 and 1 MB of L3, and the platform scores 420 single-core and 1391 multi-core in Geekbench 6, with 350 single-core and 1300 multi-core in Geekbench 5, all running on a 64-bit architecture.

The Tecno Spark 40C features a single-lens rear camera resolving at 13 MP with an f/1.8 aperture and a CMOS sensor, though it lacks a back-illuminated sensor and optical image stabilization. Autofocus is handled through phase-detection and touch AF, with continuous autofocus active during video recording, while laser autofocus is not present. Manual controls cover exposure, ISO, focus, and white balance, but manual shutter speed is not available; additional shooting modes include HDR, burst, slow-motion video, and in-camera panorama, though 360° panorama and RAW capture are not supported. Video tops out at 1080p at 30 fps with no HDR10 or Dolby Vision recording. A single LED flash is fitted at the rear — there is no dual-tone or RGB flash — and the front camera offers 8 MP resolution without a front-facing flash, a multi-lens arrangement, or an under-display placement.

The Tecno Spark 40C ships with Android 15 as a free and open-source platform, bringing a broad set of privacy controls that include 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, dynamic theming, theme customization, widgets, split-screen multitasking, Picture-in-Picture, full-page screenshots, a media picker, customizable notifications, sharing intents, Live Text, and an extra dim mode, while focus modes, Wi-Fi password sharing, and Quick Start are absent. Productivity is further supported by on-device machine learning, offline voice recognition, voice commands, device tracking, a child lock, multi-user accounts, app offloading, a battery health check, and the ability to play games while they are still downloading. Direct OS updates from the vendor are not available on this device.

The Tecno Spark 40C is equipped with a 6000 mAh rechargeable battery that is non-removable and includes a battery level indicator. It supports 18W fast charging, though neither wireless charging nor reverse wireless charging is available.

The Tecno Spark 40C includes stereo speakers but omits a 3.5 mm headphone jack and has no built-in radio. On the wireless audio side, none of the higher-quality Bluetooth codecs — aptX, aptX HD, aptX Adaptive, aptX Lossless, or LDAC — are supported.

The Tecno Spark 40C supports 4G LTE cellular connectivity with dual SIM capability, reaching download speeds of 300 Mbit/s and upload speeds of 100 Mbit/s, though 5G is not available. Wireless networking covers Wi-Fi 4 (802.11n) and Wi-Fi 5 (802.11ac), while NFC, DLNA certification, and ANT+ are absent. The device includes USB Type-C, GPS with Galileo support, an accelerometer, and a fingerprint scanner for biometric authentication, but does not offer 3D facial recognition, an iris scanner, or an infrared sensor. Safety and tracking features such as emergency SOS via satellite and crash detection are not present, and there is no barometer, heart rate monitor, HDMI output, motion or optical tracking, built-in projector, or included stylus.

The Tecno Spark 40C includes a video light to assist with illumination during video recording. The display is flat rather than curved, uses neither sapphire glass nor an e-paper panel.